Digital marketing term
Frequency Cap
Frequency capping is a campaign setting that limits how many times the same person can be shown the same ad within a set period, to prevent ad fatigue.
Detailed explanation
Without a cap, an ad platform's optimization algorithm can keep serving the same ad to the same engaged users over and over, since they are the most likely to have already shown some interest. Frequency capping puts a ceiling on this — for example, no more than three impressions per user per day, or five per week — spreading impressions across a wider set of people instead of repeatedly targeting the same audience.
The right cap depends on the funnel stage and creative: awareness campaigns with a single strong message can tolerate lower frequency before diminishing returns set in, while retargeting or reminder campaigns often intentionally use moderate, sustained frequency to stay top of mind. Signs that a cap is too loose include falling CTR over the course of a campaign and rising negative feedback, such as ad complaints or “hide this ad” actions, as the same users see the ad repeatedly — both point to ad fatigue eroding performance faster than fresh reach can offset it.
For “what is frequency capping” or “how many times should someone see my ad” searches, this entry is a starting point. Read it together with Ad Flight for the time window a cap is typically measured against, and CTR for the metric that usually signals when a cap is too loose.
Frequently asked questions
- What happens if there is no frequency cap on a campaign?
- The platform's algorithm may repeatedly serve the ad to the same responsive users, which can drive up perceived performance briefly but usually leads to ad fatigue — falling CTR and rising negative feedback — while under-reaching the rest of the potential audience.
- Is a lower frequency cap always better?
- Not necessarily. Awareness and brand campaigns often need repeated exposure to be remembered, while performance and retargeting campaigns are more prone to fatigue at high frequency — the right cap depends on the campaign's goal and creative variety.
Related terms
Internal links for the topic cluster — read these concepts together.
- FrequencyFrequency is a performance metric that expresses how many times, on average, a single user has seen the same ad within a given time period.
- Ad FatigueAd Fatigue is a performance problem where the same ad's effectiveness declines from being shown repeatedly to the same audience, causing click-through and conversion rates to drop over time.
- RemarketingRemarketing re-engages people who previously visited your site by showing them tailored ads based on their interest or on-site behavior.
- ReachReach is a core visibility metric that counts the number of unique users who saw a piece of content or an ad at least once within a given period.