---
title: About CPP A/B Testing
description: Learn what CPP A/B Testing is and what the system automates from setup to monitoring.
---
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3. [CPP A/B Testing](https://helpcenter.mobileaction.co/en/mobileaction-cmp?hsLang=en#cpp-a-b-testing)
# About CPP A/B Testing
CPP A/B Testing helps you compare Apple Ads custom product pages and see which variant performs best.
This article explains what CPP A/B Testing does and what the system automates from setup to monitoring. If you want to set up a test now, see your [**test setup options**](https://helpcenter.mobileaction.co/en/test-setup-options-in-cpp-a-b-testing?hsLang=en)**.** If you’d rather check what you can test and the key constraints first, see [**the requirements and limits**](https://helpcenter.mobileaction.co/en/what-are-the-requirements-and-limits-for-cpp-a-b-testing?hsLang=en).
#### How CPP A/B Testing works
A typical test includes these steps:
1. Choose the test setup you need (for example, testing **multiple custom product pages within one ad group** or testing **multiple ad groups with a single product page**).
2. You [**choose a test setup**](https://helpcenter.mobileaction.co/en/test-setup-options-in-cpp-a-b-testing?hsLang=en) (Parallel or Switch).
3. You select your [**desired precision**](https://helpcenter.mobileaction.co/en/statistical-background-of-cpp-a-b-testing?hsLang=en) (margin of error, **1%–10%**). The system uses a **90% confidence standard**.
4. The system calculates the test duration (and, for Switch tests, the switching schedule) based on the original ad group’s recent traffic and fluctuations.
5. You [**monitor performance and confidence signals**](https://helpcenter.mobileaction.co/en/how-to-monitor-cpp-a-b-tests-in-the-dashboard?hsLang=en) in the dashboard.
#### What CPP A/B Testing does
CPP A/B Testing automates the main parts of the workflow:
- **Setup automation**
- The platform duplicates the selected ad group or ad automatically based on the chosen test method.
- You can run tests with 2–4 custom product pages (including the default product page if desired).
- Test duration and switch intervals (hourly, daily, weekly) are automatically calculated according to your selected desired precision (1%–10%).
- **Traffic handling**
- [**Parallel method**](https://helpcenter.mobileaction.co/en/what-is-the-parallel-method-in-cpp-a-b-testing?hsLang=en)**:** keeps variants live simultaneously in the same timeframe.
- [**Stabilize Traffic (Parallel tests)**](https://helpcenter.mobileaction.co/en/how-traffic-stabilization-works?hsLang=en)**:** if one variant starts receiving disproportionately high traffic, it can be temporarily paused so others can catch up.
- [**Switch method**](https://helpcenter.mobileaction.co/en/what-is-the-switch-method-in-cpp-a-b-testing?hsLang=en)**:** shows only one variant at a time, using switching periods designed to neutralize seasonality effects.
- **Duration estimation**
- Uses the selected ad group’s last 28-day traffic as a benchmark.
- Uses your selected desired precision (1%–10%) and the fixed 90% confidence standard to calculate test duration.
- **Safe test environment and reversibility**
- During the test, the original ad group is **paused**, ensuring no outside influence affects the experiment.
- - Automations, AI Smart Bidding, and Budget Allocation actions are automatically disabled for test entities to preserve data accuracy.
- If the users do not want their strategies to be inactivated during the test, they can select a different method that covers that case.
#### What CPP A/B Testing helps you decide
CPP A/B Testing is designed to help you compare variants and decide which product page or ad group performs best, based on metrics and confidence signals in a controlled environment.
If no variant clearly outperforms the others, you can still review metrics such as impressions, conversion rate, and tap-through rate to choose the most promising option. A “no significant difference” result means the tested variants are likely to perform similarly over time.
#### Related links
- [What are the requirements and limits for CPP A/B Testing](https://helpcenter.mobileaction.co/en/what-are-the-requirements-and-limits-for-cpp-a-b-testing?hsLang=en)
- [Test setup options in CPP A/B Testing](https://helpcenter.mobileaction.co/en/test-setup-options-in-cpp-a-b-testing?hsLang=en)
- [Test creation in CPP A/B Testing](https://helpcenter.mobileaction.co/en/test-creation-in-cpp-a-b-testing?hsLang=en)
- [How do you monitor and interpret tests in CPP A/B Testing](https://helpcenter.mobileaction.co/en/how-to-monitor-cpp-a-b-tests-in-the-dashboard?hsLang=en)
- [Test health and issue management in CPP A/B Testing](https://helpcenter.mobileaction.co/en/keep-cpp-a-b-tests-healthy-and-fix-issues?hsLang=en)
---
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