18 March, 2023

What Is A/B Testing? The A/B Testing Process

Selling online means pushing harder on every campaign: full-scope SEO services, advertising visuals and conversion CTAs all need to be measured in advance. You need to know your chances of success when you aim at the right target. A/B testing helps you measure and evaluate using two versions, A and B. It is a market research technique and a way to analyze the success rate of online businesses. Questions related to What is A/B testing? How do you run an A/B test? The uses of A/B testing, and what to watch out for with this tool, are Mona Media covered in the article below.

What is A/B testing?

A/B Testing is also known as split testing. It tests which of two versions (A and B) works better. The process compares the two in the same environment or situation, and the better version is the one used for online advertising. A/B testing can test almost anything, from a banner image to web pages, ad creatives and emails, CTA…

Why use A/B testing?

Why use A/B testing?

A/B Testing and it collects data on the many factors involved in optimizing a web page. This lets you decide from accurate data instead of feelings or guesses. It lowers the risk of launching a new product or ad campaign, because you can measure results and optimize before rolling out at scale.

A/B testing also helps improve the conversion rate of a website or marketing campaign. You can find the specific changes that improve how a website or campaign performs. It also saves money on marketing campaigns and raises website revenue. By finding the best version, a business can improve results without spending much.

Why A/B testing matters

A/B testing is a useful tool that plays an important role in website optimization. Its importance shows in the following ways:

More visits to your website

Optimization user experience is a key factor in attracting and keeping users on your site. A/B testing helps you evaluate changes to the website and optimize the user experience. Running an A/B test does not guarantee more traffic. To increase traffic, you need to combine A/B testing with several other strategies.

Optimizing a page's conversion rate

A/B testing is an important tool for optimizing conversion rate on your website. By designing variants, analyzing the data and applying the best variants to the site, you can raise the conversion rate and make your website more successful. That is why so many people use A/B testing to optimize page conversion rates.

Lower bounce rate

A/B testing helps reduce bounce rate

A/B testing can help reduce your site's Bounce Rate (bounce rate). Testing different variants of your pages helps you find the elements that cause a high bounce rate and improve them. To reduce bounce rate, though, you need to choose the right elements to test. You should also make sure your sample is large and representative enough to get reliable results from the test.

Fewer abandoned carts

A/B testing can help reduce cart abandonment on your website. You can test and compare how different elements on the cart page perform. With A/B testing you can improve the user experience and raise the conversion rate on your cart page, which reduces abandoned carts and increases sales.

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The A/B testing process

The A/B testing process can vary with the project's goal or the complexity of the product. In general, it has these main steps:

  • Step 1: Set a specific goal you want to reach. For example: raise the conversion rate on a product page, raise the sign-up rate, or increase time on site.
  • Step 2: Plan the test and think through the changes to make across the two variants.
  • Step 3: Design the test and, create the variants that the development team will build for testing. Choose how long the test runs and how traffic is split between variants.
  • Step 4: Launch the test and run the variants and track the results.
  • Step 5: Analyze the results from the test to draw conclusions and judge how well each variant performs, then decide which variant to roll out.
  • Step 6: Roll out the chosen variant once you have picked the best one, deploy it to get better results.
  • Step 7: Track the site's performance metrics and keep improving the product through further improvements and A/B tests.

The elements most often tested are:

  • The CTA button: size, color and position.
  • Components and categories on the site
  • Issues related to the navigation bar or other customizable settings.

After this, the test runs. The tool measures, calculates, compares and analyzes the results, and finally gives you the outcome of the experiment.

If you still have questions about this process, or you don't have a marketing team, you can contact Mona Media. We have a professional SEO and user experience optimization team. For every request, we propose a suitable plan, and Mona Media sets up the variants for your A/B test professionally.

keyword SEO

A/B Testing SEO

A/B Testing SEO is a testing method that compares how two different versions perform. It helps webmasters and SEO specialists make accurate decisions and predict how changes to key page elements will affect organic search.

A/B Testing SEO

The page elements you can test with A/B Testing SEO include titles, page descriptions, keywords, the position of SEO elements on the page, content length, the ratio of links between pages, and more. Once you know what A/B testing is, you can make accurate decisions when optimizing a site to reach your SEO goals.

A complete A/B testing guide from A to Z

Here are the detailed steps for running an A/B test.

1. Preparing for the A/B test

Before you run an A/B test, you need to do the following.

Choose the variants to test

Choosing variants for A/B testing

Which variants you test in SEO A/B testing depends on the site's optimization goals and on the SEO strategy judgment of the webmaster or SEO specialist. When choosing variants for an SEO A/B test, test only one variant at a time and have a clear test plan, so the results are accurate and meaningful.

Setting goals

Define the A/B testing goal

Optimization goals vary with each website's and each person's SEO strategy. Common goals for SEO A/B testing include more traffic, a higher conversion rate, longer time on site, more returning customers, or building the brand image. An A/B test only helps you find the better variant. The final decision depends on the amount of data and the SEO specialist's understanding.

Create a "control" and a "challenger"

In an A/B test, creating a "control" and and a "challenger" is necessary to ensure accurate test results. The "control" is the unchanged variant, which keeps the product, interface or page as it is now. The control is also called variant A. The "challenger" is the changed variant, for example changing the red text on a "Buy now" button to blue. The challenger is also called variant B.

Split the test groups evenly at random

How you split test groups evenly at random in an SEO A/B test depends on the goal and structure of the product or site. The random test groups are usually divided into two types: the control group and the check groups and test group. In every case, the split must be random and the groups must be comparable, so the A/B test results are accurate and reliable.

Determine the sample size

Determining sample size in A/B testing

Determining sample size in SEO A/B testing helps you calculate how many users you need to run the test and get reliable results. If the sample is too small, you may misjudge the results and pick the wrong strategy. "The larger the sample, the more reliable and accurate the results," which helps you make the right decision and run a more effective SEO campaign.

Determine the significance of the results

Determining the significance of A/B testing results

Determining the significance of the results is an important step in A/B testing. It ensures the results are accurate and decides whether the change should be rolled out.

The significance of A/B testing results is usually determined with two measures: "statistical confidence" (statistical significance) and "practical impact" (practical significance). This step checks whether the difference between the two variants is big enough to affect the business.

Make sure the test runs at the same point in the campaign

It is important that the test runs only during the same stage of the campaign. In SEO A/B testing, this avoids swings caused by seasonality, search engine algorithm updates or other outside factors. When the test runs within the same stage, you can be sure the results are accurate and valid, which leads to better SEO optimization decisions for your site.

2. Running the A/B test

Running an A/B test takes 4 simple steps: use an A/B testing tool, test 2 variants at the same time, allow enough time, and ask for feedback from real users.

Use an A/B testing tool

Use an A/B testing tool

An A/B testing tool (also called split testing) helps you compare the performance of two or more variants of a web page, an email or an online ad campaign. You can see the effect of each element in your campaign and adjust to improve results.

Test 2 variants at the same time

Testing 2 variants at the same time (crossover testing) is an A/B testing method that checks the difference between variants A and B on the same test sample. To do it, split the test sample into two random groups. One group sees variant A first and then variant B, and the other sees variant B first and then variant A. When the test ends, compare the difference between the two groups.

Allow enough time for the A/B test 

Allowing enough time is important so you have enough data to judge how the variants perform. Don't rush to a decision after a short time. For the most effective test, give it enough time to collect data and analyze the results.

Ask for feedback from real users

Real user feedback is an important part of A/B testing. It lets you judge how the campaign performs from the user's point of view. Through feedback, you can understand how users feel about, experience and respond to the campaign's variants.

 3. After the A/B test

After the A/B test is finished, do the following:

Focus on the target metrics

Focus on checking the A/B test's target metrics

After the A/B test, checking and evaluating the target metrics lets you reach a conclusion and decide whether to keep rolling out the changes. The target metrics usually tracked include conversion rate, average time on page, bounce rate, the distribution of pages and products visited, and sales.

Measure significance with an A/B testing calculator

Measure significance with an A/B testing calculator

Measuring significance is an important part of analyzing test results and deciding which variant optimizes SEO performance best. There are several ways to measure significance in A/B testing. A/B testing calculators are useful tools built to make this measurement easier.

Act on the results

Based on the A/B test results, you calculate how variants A and B perform against each other and decide which gives the better result. Then you act on what you found. Calculating and applying A/B test results correctly and methodically leads to decisions that are more reliable and more practical.

Plan the next A/B test

Plan the next A/B test

The next A/B test plan should be set up carefully so that tests are run sensibly and deliver the most value. Use your experience from earlier A/B tests to plan the next one. The plan should also be based on the specific goals of each campaign you run.

Principles for applying A/B testing

To get the best results from A/B testing, apply the following principles:

Principles for applying A/B testing

Principle 1: Forget everything you know about your customers 

Sometimes forgetting everything you know about your customers can be a positive way to approach designing tests that optimize your website. Setting aside your assumptions and information about users lets you form new assumptions about their behavior and needs. But it can also lead to wrong assumptions and failed tests.

Principle 2: Always set a goal to compare against

Always set a goal to compare against

To run an A/B test effectively, you need to set a specific goal for comparing variants A and B. The goal helps you measure the variants and decide which one is better. Different goals can be chosen depending on the purpose of the product or site and your optimization strategy.

Principle 3: Don't apply it rigidly to raise CRO

When running A/B tests to raise your conversion rate (CRO), you should not apply it rigidly. CRO is an ongoing process, and it can take time to find the right changes to optimize your strategy. So apply a few more principles to make sure the A/B testing process runs effectively.

Principle 4: Test one element at a time

For effective A/B testing, you should test one element at a time. Testing several elements at once makes the results hard to control and hard to attribute to any one element. Testing them one by one lets you judge each element's effect and make the best decision for it.

Principle 5: Don't conclude until you have accurate statistics

The most important thing in A/B testing is to not rush to a conclusion before you have accurate statistics to decide with. You need enough samples and enough test time to keep the results scientific and reliable. Judging A/B test results on gut feeling or insufficient data leads to uncertain decisions and unwanted risks.

Principle 6: Learn before you run

A/B testing is the most effective way to optimize the conversion rate (CRO) of your website. But to get the best results, you need to learn and research before you start. If you don't learn the A/B testing process, you may apply it the wrong way and not get the results you want.

Principle 7: Gather opinions from many sources

Gather opinions from many sources when applying A/B testing

When running A/B tests, gathering opinions from many sources is very important to make sure your final decision is right and gets the most out of your website. You can collect input from SEO experts, product managers and users through surveys. What matters is weighing and evaluating those opinions properly and making the best decision.

Principle 8: User behavior data and customer survey data can conflict

User behavior data usually comes from tracking customer actions and other information. Customer survey data is usually collected through surveys or direct interviews and covers customers' opinions, ratings and impressions of the product. The two kinds of data can conflict, so collect and use them separately and independently of each other.

Principle 9: Define your success criteria clearly

One essential step in A/B testing is to define your success criteria clearly. These criteria tell you whether your test succeeded. Without them, it is very hard to get the right result for your campaign.

Principle 10: Don't test unimportant elements 

When running A/B tests, you should avoid testing unimportant elements. Doing so wastes time and money and brings no benefit to your campaign. Decide in advance which elements to measure and survey, and focus on those to get the results you want.

How to read A/B testing results

How to read A/B testing results

To read A/B test results accurately, you need to measure, check and compare carefully.

Measure and check the target metrics

In an A/B test, measuring and checking the target metrics is essential to know the result of your test. Depending on your purpose and goals, there can be many different target metrics for judging the test. What matters is deciding in advance which target metrics you want to measure and track.

Compare conversion rates

Comparing conversion rates is a simple method widely used in A/B testing. It compares the conversion rates of variants A and B to judge how they perform. The conversion rate is the number of conversions divided by the total number of trials. The variant with the higher conversion rate is the better one.

Segment the audience to find more insight

Audience segmentation is an important method for finding more insight in A/B testing. It splits users into groups based on specific attributes and characteristics, and checks how the A/B variants perform for each group. After segmenting, you can measure each variant's performance for each group. This helps you find new information and make better optimization decisions.

Uses of A/B testing

A/B testing is useful and widely applicable to websites, sales advertising, mobile apps and email marketing.

For websites

A/B testing on a website

A/B testing can help you optimize your website's user experience and improve its performance and revenue. Time on site matters for increasing visits and sales.

With A/B testing, you can test different elements on your site to improve time on site and user productivity. A/B testing can also help you find the elements that affect page load speed and improve your site's performance.

For sales advertising

A/B testing can improve the performance of your sales ads in these ways:

  • The tool helps you test how different ad headlines perform to find which headline gets more clicks. You can try different headlines to find the one with the best click-through rate.
  • Help you find the most effective ad placement to bring your product to your target customers. Try moving the ad position on the page to find the best spot, one that raises click-through rate and sales.

You can also use A/B testing to compare different content and find the most useful ad.

In mobile apps

Using A/B testing in a mobile app

Mobile apps can use A/B testing to find the elements that raise download rates and user engagement. A/B tests can help find the home screen layout that best catches users' attention. Beyond the home screen, tests can also find other interface details that increase engagement, such as button position or element colors.

A/B testing helps you identify which features can improve the user experience or raise the app's download rate. It is also used to test security features or performance functions of a mobile app.

Cho Email marketing

Using A/B testing in email marketing

A/B testing is an important tool in Email Marketing to optimize your campaign and improve email open rate, click rate and conversion rate. You can test different subject lines to catch the recipient's attention and raise the open rate. Send time can also affect how an email campaign performs. A/B testing helps you find the best time to send and raise open and click rates.

Tools for A/B testing

As more and more teams use A/B testing, Mona Media would like to introduce some tools that support testing:

AB Tasty

AB Tasty

AB Tasty is an A/B testing tool that helps evaluate the performance of a website, app, email or ad campaign. AB Tasty works by comparing two different variants, so you can create variants of a website or email. It also applies changes to measure the effect on target metrics such as conversion rate, page load speed and average order value.

ClickTale

ClickTale

ClickTale Colocation is a is a tracking tool user behaviour. It not only collects and analyzes data but also lets you run A/B tests. ClickTale lets webmasters run A/B tests effectively and reliably. It also offers other services, such as heatmaps, session replay and conversion analytics, giving webmasters a complete and detailed view of user behavior.

CrazyEgg

CrazyEgg

CrazyEgg is a conversion rate optimization (CRO) tool that lets you run A/B tests. CrazyEgg gives you an easy-to-use interface for measuring and analyzing data on your website, so you can see how your customers interact with it. Its A/B testing tool lets you create different versions of a page and show them to different groups of visitors.

EyeQuant

EyeQuant

EyeQuant is a measures user experience (UX) on websites. EyeQuant uses artificial intelligence to analyze how well a site attracts and keeps visitors. It measures general site metrics, including information density, contrast, visual appeal, readability and page load speed. These are key metrics for judging the experience and improving user satisfaction on your website.

Optimizely

Optimizely

Optimizely is an A/B testing tool that helps is a staged testing tool that helps evaluate how well a website or app performsIt reports goal metrics such as conversion rate, page load speed and time on page. It also lets users change page content and track how those changes affect conversions.

4 common A/B testing mistakes and how to fix them

Mistakes are unavoidable when you run A/B tests. Here are the errors people hit most often, and how to fix them:

The testing tool fails

If an A/B testing tool fails while testing variants, you may see slower page loads, unwanted side effects, or a negative impact on the user experience. When that happens, start with some basic checks, such as your internet connection and updating your browser, or contact the provider for support, a fix or an alternative.

Stopping the test as soon as you see a result

While running an A/B test, you need to observe and collect data to judge how each variant performs. Deciding when to end a test is not just about the numbers collected; it also takes the marketer's judgment and experience. To keep the results accurate and reliable, don't stop the test the moment you see a result. Set clear criteria for stopping before you start.

Focusing only on conversions

Conversion rate is an important metric, but looking only at conversions won't give you the testing results you want. You can also track other metrics such as page load speed, accessibility, traffic and average order value. With these metrics, A/B testing can serve several goals: improving the user experience, lowering bounce rate, and raising revenue and profit for the product or website.

Only testing small things

A/B testing usually starts with small changes, such as a headline, body text, images or page layout. Over time, though, people tend to test bigger changes, including changes to the business model, the user interface or the site's functions, to get stronger results.

Things to note when running A/B tests

What to do in A/B testing

  • Know when to stop and make a decision, rather than letting the test run too long.
  • Keep conditions consistent so you can tell which variant users prefer.
  • Run the test more than once to get accurate results.
  • Run A/B tests for mobile and desktop separately. The two behave differently, so the traffic you get in each test will differ.

What not to do in A/B testing

  • Both variants must run in parallel, over the same period. When the timing differs, don't compare version A with version B.
  • Don't draw conclusions too early. Wait until the test has run for the ideal period, then analyze the reports and act on them. Concluding after a single test, or after only 1 to 2 days, gives inaccurate results.
  • A/B testing Run tests on new potential customers. Existing customers may be surprised by the change, and you may not end up using that variant after the test anyway.
  • Don't let your gut feeling override the result once you've run an A/B test. The result is concrete, filtered evidence collected over a long process.

Website design also affects conversion rate in A/B testing, so check the quality of your website before running any campaign to get the best possible result.

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A/B testing FAQ

Khi Running A/B testing raises a few questions, so we Mona Media answer some of the common ones below:

1. Is A/B testing really important?

A/B Testing is very important for optimizing and improving the user experience on websites and apps. It helps you evaluate the effect of changes to your site. With A/B testing, you can compare several variants of a website or app, pick the better ones and keep optimizing. A/B testing brings a scientific, repeatable process to improving the user experience.

2. When should you run A/B testing?

A/B Testing is an important way to optimize a website, but it isn't right in every situation. Here are some cases where it makes sense:

  • A newly launched website: When you've just built a new website or a new site system, A/B testing helps you evaluate and improve the elements that affect conversion rate.
  • Low traffic: When your site has low traffic, A/B testing can help you find which elements to optimize to increase visits and conversion rate.
  • Improving conversion rate: When you want to raise your site's conversion rate, A/B testing helps you find which variants or elements can lift it.
  • Limited time and budget: A/B testing is an optimization method that can save you time and money compared with redesigning the whole website.
  • Improves user experience: When you want to improve the user experience on your site, A/B testing helps you evaluate and improve elements such as interface, format and content.

3. What should you do after you get A/B testing results?

After you've run an A/B test and collected the data, pay attention to these steps:

  • Step 1: Analyze the results: Analyze the A/B test results to see the differences between variants and how much each one improves your goal.
  • Step 2: Make a decision: Based on the results, decide which variant to apply to your website or product.
  • Step 3: Record and learn: Record the A/B test results so you can learn from earlier experiments. This will help you approach the next A/B tests better.
  • Step 4: Run the next experiment: If the current A/B variant doesn't improve your website or product, consider running new experiments to find a better way to optimize.

Related topics on What is A/B testing? We've covered how A/B testing works in detail in this article. We hope you can apply A/B testing to your own business and field. Contact us if you need advice on running A/B tests.

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  • Email: info@mona-media.com
  • Address: 1073/23 Cach Mang Thang 8 Street, Ward 7, Tan Binh, Ho Chi Minh City
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CEO & Founder · The MONA

The founder of The MONA built a service company of 60+ staff with 14,000+ projects delivered. Khánh Hùng shares his thinking on building self-running systems, automating a business, and the real lessons behind MONA's projects.

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