Which of the following describes the number of times a unique user will see an ad over a given time period?

Analysis of Correct Answer(s)

• Frequency: This is the most precise answer. Frequency is a core Google Ads metric that specifically measures the average number of times a single unique user is exposed to your ad over a set period. It directly answers the question.
• Impression: An impression is counted every single time an ad is displayed on a screen. Therefore, the "number of times a unique user will see an ad" is fundamentally a count of impressions attributed to that specific user. While Frequency is the metric that averages this across all users, impressions are the raw counts of each viewing instance.

Analysis of Incorrect Options

• Reach: This metric is often confused with frequency, but it measures something different. Reach refers to the total number of unique users who have seen your ad at least once. It measures how many distinct people you've reached, not how often you've reached them.
• Engagement rate: This metric measures user interaction, not exposure. Engagement rate is the percentage of impressions that resulted in an engagement (like a click, a video view, or a like). It tells you how compelling your ad is, not how many times it was seen by a user.