Your landing pages won’t magically fix your PPC ads – you need more. You need landing page A/B testing.

While businesses aim to build the best landing pages to boost conversions, treating them as “invest and forget assets” risks watching campaigns disappear and having to start over from scratch, resulting in a waste of time, money, and effort.

Landing page A/B testing saves your resources by helping you understand your target audience without invading their privacy. It truly helps personalize your campaigns for the customers and conversions.

However, A/B testing extends beyond mere comparison of variations. Misinterpretation of tests can lead to underwhelming results.

In this blog post, we will delve into the fundamentals of landing page A/B testing, explore common pitfalls that can compromise the accuracy of your test results, and discuss how to do A/B testing with low traffic on landing pages.

What Is Landing Page A/B Testing?

Landing page A/B testing involves creating two or more versions of a webpage and comparing their performance to identify which one yields better results. It is a convenient and effective way to understand how best to optimize your landing pages. It easily tests various page iterations to determine which version gets you to your conversion goal first.

The two versions may feature substantial differences, ranging from adopting a new layout to smaller changes, such as altering the color of the CTA button. Irrespective of the scale, the A/B test is adept at addressing all your landing page challenges.


Landing page A/B testing consists of three main elements:

1. Control

- Definition: The original landing page or element that serves as the starting point for an A/B test.

- Role: Used as a baseline to compare against variations to assess the impact of changes.

2. Variation

- Definition: Modified version of the landing page created to test specific changes.

- Role: These variations are tested against the control to identify which design or content elements are more effective in achieving the desired goals.

3. Hypothesis

- Definition: A statement predicting the expected outcome of the A/B test based on the changes made to the landing page.

- Role: It guides the test by setting clear expectations, helping to interpret results, and making informed decisions based on the observed performance of the control and variations.

By making minor tweaks and continuously testing, you can understand the impact of each individual change and eliminate the guesswork of landing page optimization.

The most effective and recommended way to do A/B landing page testing is to make one change at a time. That way, you have an accurate representation of the result of each change, and you can examine them independently.

Why Should You Use Landing Page A/B Testing?

Using A/B testing for your landing pages is like turbocharging your online strategy, especially for PPC (pay-per-click) landing pages. These pages play a big role in determining whether your ad budget is well spent.


Landing page A/B testing is a game-changer because it helps you to:

1. Know Your Target Audience Better

Building a post-click landing page often involves assumptions about your target audience. Competitor research helps, but uncertainties remain. Landing page A/B testing dispels the uncertainty by providing data on user preferences.

Instead of guessing about design and content, A/B testing allows you to make informed decisions based on real user feedback. It ensures your landing page resonates effectively with your audience.

2. Get More Conversions

Even slight adjustments to your landing page can significantly improve conversion rates. A/B testing is the key to discovering these subtle changes in your landing page elements that can make a big difference.

Landing page A/B testing not only pinpoints these optimizations but also elevates your overall user experience. This translates into a higher conversion rate, transforming more visitors into leads and, ultimately, customers.

3. Secure Higher ROI

A/B testing goes beyond just engagement—it fine-tunes your strategies to get more value from your investment. By looking at how users respond, it helps you make your landing page work better. This means you get the most out of every dollar you spend on advertising, ensuring you get the best results.

Lower bounce rates and higher conversion rates make up for the perfect equation to get a favorable ROI.

A/B Testing vs Split Testing: Which is Better?

Confused between A/B testing and split testing? Here is a video which can help you understand both better.

How Much Traffic Do I Need For Landing Page A/B Testing?

The traffic sample size required to successfully conduct a landing page A/B test depends on four factors.

  1. Minimum Detectable Effect (MDE)

  2. Conversion rate of control

  3. Statistical significance

  4. Statistical power

All of these four factors together help mitigate two common mistakes that occur while doing A/B testing.

  • Type I or False Positive Error: It’s a mistake leading to the conclusion that there is an effect or difference when, in reality, there isn’t one. Statistical significance counters such errors.

    Example: In A/B testing, a Type I error would happen if the test incorrectly concludes that a change in the landing page has a significant impact on user engagement when, in fact, there is no real effect.

  • Type II or False Negative Error: It’s the mistake of concluding that there is no effect or difference when there actually is one. MDE and statistical power counter such errors.

    Example: In A/B testing, a Type II error would occur if the test fails to detect a genuine improvement in user engagement resulting from changes in the landing page, leading to the incorrect conclusion that the changes had no effect.

What Minimum Detectable Effect (MDE) in A/B Testing?

A pre-test concept, MDE, answers the question: “What is the smallest difference I want my A/B test to be able to detect?” It is a crucial parameter to consider during the planning phase of the test because it influences the required sample size.

What is Statistical Power (SP)?

It’s the ability of the test to detect a meaningful change or improvement when one is present. It is usually taken as 0.8 or 80%.

What is Statistical Significance in A/B Testing?

In A/B testing, statistical significance refers to the likelihood that the observed differences in performance between the control and variations are not due to random chance. It is usually taken as 0.05 or 5%.

Complicated. We know.


Here’s an example to understand the above: Imagine you have two types of apples you want to sell in stores. You decide to conduct a taste test to determine whether there’s a real difference in their quality.

  • Statistical Power (SP): Think of SP like how good your taste buds are. If you can taste even tiny differences (high SP), you’ll notice if one apple is slightly sweeter than the other. If your taste buds aren’t as sensitive (low SP), you might miss small changes.

  • Minimum Detectable Effect (MDE): MDE is the smallest difference in taste you want to notice. If you want to be sure you can taste even a tiny improvement in sweetness, your MDE is small. But if you’re okay with only noticing big changes, your MDE is bigger.

  • Statistical Significance: Now, imagine you have a rule. Before you say one apple is better, you want to be really, really sure. This is like setting a high level of statistical significance. If you follow this rule, you won’t easily say there’s a difference unless you’re highly confident.

So, in your taste test, if you have really sensitive taste buds (high SP), you’ll need a lot of apples to be very sure (high Statistical Significance) that your changes made a difference, especially if you want to notice even tiny improvements (small MDE).

It’s about finding the right balance between noticing small changes, being very sure before claiming a difference, and deciding how small of a difference is important to you.

How to Calculate the Sample Size for A/B Testing Landing Pages?

Here’s a calculator you can use to check what the sample size should be for your landing page A/B test. The value of statistical significance and power has been set to 5% and 80% by default in this tool. It helps you get a rough idea of how much traffic you’d require to conduct landing page A/B testing.


How to do A/B Testing Step-by-Step for Landing pages?

Get started on your A/B testing to boost the conversion potential of your landing pages and increase your revenue. Follow these seven steps to develop your A/B testing landing page framework and start running your own tests.

1. Define the Conversion Goal of Your Landing Page

The initial and most important aspect of constructing your A/B testing landing page framework is having a well-defined conversion goal for your landing page. In other words, you need to know what you want to achieve before you get started.

This is because you need a clear idea of how to design and optimize your landing page based on the goals that you have set out.


Additionally, the landing page goal should be clear, for example:

  • Sign up for free content

  • Register for the webinar

  • Subscribe to our newsletter

2. Set Up Conversion Tracking Tools on the Landing Page

You need to acutely understand how your landing page is currently performing and how each change has made a difference. One of the ways you can do this is by adding Google Analytics tracking to your landing page.


Google Analytics enables you to monitor several metrics on your landing page and understand what needs to be tweaked. Some of the useful metrics that you can use to understand and optimize your landing page include:

  • Traffic source

  • Goal completions

  • Session duration

  • Landing page sessions

Another pro tip is to use a landing page builder that has the ability to track your conversion rates. The more information you gather about your landing page, the better your understanding of it. And this, ultimately, means you know exactly which areas of your landing page to target for your A/B testing.

3. Calculate the Time and Traffic Required to Run the Test

Now that you have the tools to track and monitor your landing page performance, you need to know how to get the necessary traffic to your page to perform your A/B testing. Beyond that, you need an idea of how much time it will take you to run and complete these tests, get the results and make the necessary changes.


There are various free and paid channels you can use to get that traffic flowing. Some of the most useful free and paid options for you include:

  • Free channels: Marketing campaigns, sending out email newsletters.

  • Paid channels: Social media ads on platforms like LinkedIn and Facebook, Search advertising.

There are many platforms at your disposal to help you complete this step. The key is to ensure that how you structure marketing on these channels aligns with the goals of your landing page.

4. Draft Hypothesis/Observe and Formulate Hypothesis

Now that you have gathered your qualitative and quantitative data, you need to put it to good use. That’s right – it’s time to make sense of all of the data you have collected. To do this in the most accurate way possible, consider drafting a hypothesis. Your hypothesis should be specific, and the goal you are trying to meet or the question you want to answer should be clear.


Once you are confident that you have your hypothesis, you’re ready to test the different elements or parameters to either prove or disprove your hypothesis. The type of testing that you do on your data depends on how much traffic you manage to get to your page.

  • For high traffic: Use simple A/B testing where you pick one hypothesis to test at a time.

  • For low traffic: Use a multivariate test to make changes to multiple-page sections and test the impacts thereof. There are other methods we share for low-traffic landing pages as well later in the blog post.

5. Run the Experiment

Yes! You’ve made it to the exciting part. In running your experiment, you finally have the opportunity to collect data. This data, in turn, will give you invaluable insight into how people interact with your landing page and the variants that you are testing. These results will ultimately inform whether you should pick your variant or control it to increase your lead generation.


Before we get on with running any experiments, let’s look at what types you can use and which methods are best to apply.

  • Split testing control and variation by traffic: The important first step is to start your experiment from a position of equality. The key is to create a variant and then distribute your traffic equally between your variant and original pages.

    The variant is the new version of your landing page that you use for your A/B testing. You can have as many variants as you desire based on how many elements of your page you want to test.

    For successful testing, 50% of your traffic should be directed to your variant page, and the remaining 50% should be directed to your control page. The one catch with this method is that you need to have enough users visiting the page for your testing to be statistically significant. This method is best applied when you have high traffic volumes.

  • Sequential testing: Another method that can be used is sequential testing. With this type of testing, the traffic is not split. Instead, you run the tests one at a time, sending 100% of the traffic to each page you are testing. This means you are running the tests one at a time.

6. Result Analysis and Deployment

Now that you have your test results, you need to analyze your data to determine which elements work best for increasing your landing page conversion rates. Some of the metrics you might consider while analyzing your data are:

  • Confidence level

  • Direct and indirect impacts on other metrics

  • Percentage increase or decrease in your conversion rates


After running these tests and analyzing the data, you should have a clear winner. It’s time to get those conversions in and deploy the winning page!

7. Rinse and Repeat

As with any experiment, there is a chance that you may run your tests and the results are inconclusive. You might not know which variation of your page to launch because the data wasn’t as clear-cut as you would have liked. If this is the case, don’t panic. You can always run the tests again, and you may get a different outcome.

You can also change the parameters of the test (for example, increasing your sample size). The beauty of using the A/B testing landing page framework is that you can run the test as many times as you’d like. Eventually, you’ll get the outcome of increased landing page conversions.

How to Make The Most of Landing Page A/B Testing Framework?

While the efficacy of the step-by-step A/B testing landing page framework is undeniable, a crucial question comes: ‘What should we test?’

The multitude of elements on a landing page often leads to many potential hypotheses, which can confuse marketers. Rather than fixating on a broad question, let’s reframe it: ‘What should we test to maximize data acquisition in minimal time?’

If you initiate testing on a singular element, such as an image, it may take an extended period before any substantial changes become evident.

Let’s revisit the earlier concept we explored, namely the Minimum Detectable Effect (MDE), which posed the question:

'What is the smallest difference I want my A/B test to be able to detect?’

To achieve this minimal detectable difference, it is advisable to test an element that can achieve significance more swiftly. This presents us with two viable options:

  • Focus on high-impact changes directly influencing your primary metric.

  • Test alterations on an element with which the visitor interacts.

In short, we want to focus on landing page elements directly impacting visitors’ mindset.

Here are some ways to align the MDE with your landing page A/B testing.

1. Reformatting the Layout

If you’re thinking about making big changes to your landing pages and wondering what to do, try shaking things up by changing the whole layout. This way, visitors will react differently, making it easier for you to figure out what your target audience likes.

2. Switching the Price

Price matters in decision-making. Compare your prices with competitors to ensure you offer the right value. If changing prices isn’t an option now, improve your pricing section layout.


Highlight unique selling propositions (USPs) with compelling use cases and imagery for maximum impact. Experimenting with different layouts and copy can be beneficial as the pricing section is a key point of interest.

3. Changing the offer

Providing incentives like discounts, lead magnets, and free quotes is common for lead generation landing pages. Your offer should strongly resonate with the audience, fulfilling a genuine need to encourage conversion. These valuable offers also boost interaction, increasing the likelihood of gathering valuable data on user behavior.

4. Using a Different Creative Approach

Try something new in showing off your campaign on the landing page. Instead of using the same pictures, text, and buttons, mix it up a bit. Get creative to grab your audience’s attention in a fresh way. You can use conversational or interactive landing pages in the quest to execute that.

5. Testing Above the Fold

Maximize the potential of the space above the fold on your landing page, as 100% of your traffic encounters it. Utilize this prime real estate effectively for your tests, ensuring that changes here are interactive for visitors.


When conducting tests below the fold, consider generating custom impressions to trigger events at specific scroll depth points (e.g., reaching 30% of the page). This approach allows you to track visitors who were exposed to the changes made.

“A/B testing on a landing page with low traffic requires patience and a strategic approach. At altLINE, we focus on making significant changes that can potentially have a significant impact. This could be altering the layout or the wording of our main value proposition. We then allow sufficient time to gather meaningful data before making any conclusions.”
-Gates Little  President/CEO altLINE Sobanco

Do’s and Don’ts of Landing Page A/B Testing

Businesses often encounter common pitfalls and essential elements in A/B testing. Neglecting these factors can result in delayed outcomes and the wastage of testing potential. Let’s discuss the essentials.


Landing Page A/B Testing KPIs To Follow

Once you’ve completed the setup of your landing page A/B tests, it’s crucial to conduct a thorough analysis. Refer to the following list of Key Performance Indicators (KPIs) that are essential for a precise understanding of the performance of your landing page variations.


  1. Products Added to Cart: Monitor cart additions to analyze both cart abandonment and landing page performance.

  2. Newsletter Subscriptions: Evaluate the effectiveness of email marketing campaigns by tracking new subscriptions.

  3. Visitor Feedback: Gather direct insights from customers to better understand their experiences on the landing page.

  4. Scroll Depth: Assess whether crucial landing page sections are being viewed by analyzing user scrolling behavior.

  5. Time on Page and Session Time: Gauge user engagement levels by tracking the time spent on the page and overall session duration.

  6. Bounce Rate: Identify potential issues with landing page content, especially at the top fold, by examining the bounce rate.

  7. Exit Rate and Exit Pages: Pinpoint common exit points on the landing page to understand where users commonly leave.

  8. Customer Journey: Track user paths through the landing page to identify specific drop-off points in their journey.

  9. Custom Events: Measure specific user interactions such as button clicks or video plays to assess engagement.

  10. Visitor Retention: Differentiate between new and returning visitors to understand overall audience retention.

  11. Downloads: Track the downloading of resources like ebooks or white papers to measure user interest.

  12. Form Completion Rates: Evaluate how many users initiate versus complete forms on the landing page.

When Should We Do Iterative A/B Testing for Landing Pages?

Determining the optimal point to conclude landing page A/B testing can be challenging. To guide you in making this decision, consider the following framework. It can assist you in understanding when it’s appropriate to reassess or refine your variation and when patience might be the better course of action.

Created by Mutiny for websites, we believe it is also suitable for landing pages. Here is a better version of the table where the sample size has been kept as small as possible.


What is Conversion Lift?

Let’s understand what we mean by lift in the table with the help of an example:

Let’s say we have two landing pages: Landing Page A and Landing Page B.

  • Landing Page A has a Conversion Rate (CR) of 25.6%.

  • Landing Page B has a Conversion Rate (CR) of 43%.

We want to understand the percentage difference between their conversion rates, which is called the LIFT.

First, we find the difference between the two conversion rates.

Difference = 25.6 - 43 = 17.4

Then, we divide this difference by the initial conversion rate of Landing Page A (25.6).

Percentage of increase = 17.4 / 25.6 ≈ 0.6796875

Finally, to express it as a percentage, we multiply by 100.

LIFT ≈ 0.68 * 100 ≈ 67.97%

Now, let’s discuss the different scenarios in brief:

1. <100 Visitors

If your landing page has less than 100 visitors, it’s too early to decide anything. If you see a lift of 20%, you still need more visitors. Don’t lose hope with a 20% decrease either—just get more visitors for a better picture.

2. 100-300 Visitors

If your landing page shows a decrease in conversions of 20% or more, it’s crucial to revisit your variation. Analyze what went wrong using tools like heatmaps and GA4. For conversion changes ranging between -20% to +20%, or anything exceeding a 20% lift, it’s advisable to wait until statistical significance is achieved before making any changes.

3. 300+ Visitors

Even if you experience a conversion lift of more than 20%, it’s advisable to wait until statistical significance is reached. However, for changes in conversions ranging from -20% to +20% or anything below a -20% lift, it’s recommended to make iterations.

Latest Landing Page A/B Testing Case Study

A UK-based company focused on helping clients with tax rebates faced a challenge. Their form required extensive case details, not just personal information. It made some people think twice, resulting in fewer leads and lower conversion rates. This is where our landing page optimization experts stepped in.
  • We carefully studied how customers felt during sign-up. Using our knowledge of customer behavior and data analysis, we looked into different areas where we could improve to boost sign-up rates a lot.
  • After a stringent landing page A/B testing process, we were able to increase the end-to-end conversion rate from 4.33% to 6.09%.
Check out the case study here: Landing Page Testing

A/B Testing Alternatives for Low-Traffic Landing Pages

Landing Page A/B testing does take a lot of effort, as you’ve already read more than 3000 words about it. So, if you want to take it slow, we have options for you as well.

1. User Research

User research encompasses diverse methods, including user testing, design surveys, and preference tests. User testing involves hands-on interaction for insights into usability, while surveys collect quantitative data on preferences.


Design preference tests focus on aesthetics, guiding designers to create visually appealing and user-centric products. This holistic approach ensures products align with user expectations and enhance overall user experience.

Preference Testing

Preference testing is crucial for creating user-centered designs that meet functional requirements and align with users’ preferences, enhancing the overall user experience.

During this testing, participants evaluate different design elements and provide feedback on their preferences, aiding designers in making informed decisions.

UsabilityHub facilitates preference tests without requiring website traffic. With 100 users providing feedback on your pages, it also automatically calculates statistical significance for insightful result interpretation.

User research employs various methods, including heatmaps and session recordings.

Heatmaps visually depict user engagement, assisting in optimizing element placement. Session recordings capture real-time interactions, identifying usability issues and improving the user interface. Integrating tools heat mapping tools like Crazy Egg, VWO, Hotjar, etc., enhances a business’s ability to refine designs based on observed user behavior.

2. Heuristic Analysis

Heuristic analysis is key in optimizing a landing page design. This method evaluates the design against usability principles and identifies potential issues in navigation, information clarity, and workflow efficiency.

By applying basic principles of UX and CRO, designers can enhance the user experience, addressing weaknesses and ensuring the landing page aligns with best practices.

3. Improve Site Load Time

Boosting landing page performance focuses on improving site load time. Streamlining elements, optimizing images, and leveraging CDNs create a faster, more efficient user experience, leading to increased engagement and higher conversion rates.


Swift load times are vital for positive first impressions and overall user satisfaction on landing pages.

Ready to do Landing Page A/B Testing The Right Way?

A well-executed landing page A/B testing framework is pivotal for optimizing conversions. By understanding the essentials, avoiding common pitfalls, and adopting strategic frameworks, you can refine your pages effectively.

Patience is crucial, especially with varying traffic levels. Focus on impactful changes, monitor key performance indicators, and consider alternatives like user research. With a strategic approach and continuous testing, you can consistently enhance your landing page performance for maximum results.

What You Should Do Now?

Found this blog post helpful? Here are more ways in which we can help your B2B business grow:
  1. Before You Start Testing:

    Did you know that Apexure has our 100+ blog posts on landing pages. From creation to testing, analysis to optimization, we have shared everything there. Check it out before your first landing page test.

  2. Need Help With Landing Page Testing:

    Landing page testing is a great tool for conversion optimization. When done right it can provide you better CPL and ROIs. Take help from one of landing page optimization experts today to better your testing.

  3. Think You Might Be Missing Something:

    Check out our landing page portfolio to discover conversion-friendly landing page elements that might be missing from your campaigns. Filter your industry and check which landing page design is trending.

Frequently Asked Questions

How do you test landing pages?

A/B testing is the most popular way to test landing pages, followed by multivariate testing.

How do I test the landing page copy?
How to A/B test landing pages without a tool?


About The Author

Waseem Bashir
Waseem Bashir,CEO

As CEO and Founder of Apexure, Waseem Bashir's decade-old experience in building and optimizing landing pages extends to collaborations with Fortune 500 leaders. He transforms this wealth of expertise into remarkable landing pages, inspiring marketers toward targeted marketing success.

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