Definition of Reach – Google Ads
In a Reach and Frequency report, “Reach” is defined as the:
- Number of unique users exposed to an ad.
- Demographic populations to which an ad is served.
- Geographic locations in which an ad is served.
- Distance between a user exposed to an ad and the business location of the advertiser.

Definition of Reach – Google Ads
The correct answer is:
- Number of unique users exposed to an ad.
Explanation: Reach is an estimate of the number of users within a selected location target, based on unique cookies.
You can read more here: https://support.google.com/partners/answer/1722045?hl=en
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