Question: Which of the following describes the number of times a unique user will see an ad over a given time period?
- Reach
- Frequency
- Impression
- Engagement rate
Explanation
Frequency measures how often the same unique user sees an ad over a defined time period. It is a reach-based metric because it depends on unique users rather than total ad serves alone. In Google Ads measurement, frequency helps evaluate repeated exposure and control how often ads are shown to the same person. This makes it different from total delivery metrics that count every ad appearance.
Why the other options are incorrect
Engagement rate measures interactions relative to ad exposure, not repeated ad views per user.
Impression counts each time an ad is shown, regardless of whether the same user saw it before.
Reach measures the number of unique users exposed to an ad, not how often each user saw it.
Source for verification
https://support.google.com/google-ads/answer/2472714
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