# Ad testing thresholds

Ad testing thresholds define the volume of data needed for a valid test result. You can find account and campaign thresholds under **Ad testing**.

<figure><img src="/files/YMSSEpYABk96UcX0eZPN" alt="" width="563"><figcaption></figcaption></figure>

<figure><img src="/files/rGy0frJwZHFZlqaWnab8" alt=""><figcaption></figcaption></figure>

### **Thresholds for single ad group testing**

In a single ad group test, the thresholds apply to **each ad**.

For **daily automated tests**, the defined thresholds are used for all test runs. You can override account thresholds at the campaign level.

For **manual single ad group tests**, you can override the thresholds for every test run.&#x20;

### **Thresholds for multi ad group testing**

In a multi ad group test, the thresholds apply to **each set of ads** (defined by patterns or labels).

For **daily automated tests,** the defined thresholds are used for all test runs. You can override account thresholds at the campaign level.

For **manual multi ad group tests,** you can override the thresholds for every test run.&#x20;

### **How do thresholds affect the test metrics?**

A threshold is used only when it's relevant to the [metric](/tools/ad-testing/faqs/ad-testing-metrics.md) being calculated:

* **Click threshold**: only used when calculating the **CTR** and **conversion rate** metrics.&#x20;
* **Impression threshold**: only used when calculating the **CTR, conversions/impressions** and **conversion value/impression** metrics.&#x20;
* **Conversion threshold**: used when calculating **all metrics, except CTR**.&#x20;
* **Confidence** and **date range thresholds**: used when calculating **all metrics**.&#x20;

What threshold values should I use?

* #### [The minimum data you should define by testing metric](https://adalysis.com/blog/the-minimum-data-should-you-define-by-testing-metric/)
* #### [How much data should you have before examining an ad test result?](https://adalysis.com/blog/how-much-data-should-you-have-before-examining-an-ad-test-result/)


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