> For the complete documentation index, see [llms.txt](https://support.happydemics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.happydemics.com/analysis/methodology-and-basic-rules/do-i-have-enough-respondents.md).

# Do I have enough respondents?

Each Brand lift collects enough respondents to assess the performance of a campaign, i.e. 250 ad recallers and 250 respondents in the control-group. Regardless of the campaign's performance, the number of respondents is guaranteed.

Our experts have defined these numbers based on the acceptable error margin for a Brand lift. To ensure proper use of your results, here are a few simple rules:

* Below 50 respondents per pool, we recommend not drawing any conclusions from the results;
* Between 50 and 80 respondents, the results should be considered as trends;
* With 80 or more respondents per target, the results can be considered solid.

This is why 250 ad recallers are more than enough for a Brand lift. However, if you wish, you can add respondents to your Brand Lift. All you need to do is add an audience boost.


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