> For the complete documentation index, see [llms.txt](https://docs.adalysis.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adalysis.com/tools/ad-testing/multi-ad-group-testing/testing-by-label.md).
# Testing by label
Split-test sets of ads across ad groups or campaigns based on labels
Multi ad group testing using labels helps you to split-test **sets of ads** across multiple ad groups or campaigns. Labels allow you to include and exclude ads as needed.
This approach can be **useful for low-volume accounts** that don’t accrue enough data to reach statistical significance with [single ad group testing](/tools/ad-testing/single-ad-group-testing.md).
### **How to run multi ad group tests with labels**
Go to **Ad testing** > **Multi ad group** > **By label**
1. Select your campaigns and the date range for this test. A common date range means Adalysis will calculate a date range during which all ads within the test were active.
2. Specify the ad labels you want to use or exclude for comparing your ad performance.
3. Click **Find current winners**.
4. If you want Adalysis to run this test automatically, click **Save & run this test daily**. The test definition will then appear in the **Automated test definitions** tab and the daily test results will appear in the **Automated test results** tab.
{% hint style="warning" %}
When using a **common test date range**, if one matching ad out of many was enabled only a few days ago, it will cause the whole test to run using only the last few days of data.
{% endhint %}
#### **Bulk actions**
You can pause all ads with the losing label(s) for a specific metric. Once you pause the ads, the test results will be saved under the **Archived test results** tab.
