What is frequency capping?
Frequency capping is a campaign setting that limits how many times the same user, device or household can see an ad in a given time window. A cap of 3 per week, for example, means that once someone has seen the ad three times in seven days, the DSP stops bidding to show it to them until the window resets.
Without a cap, programmatic algorithms tend to keep serving ads to the easiest, cheapest users to reach, which wastes budget and annoys people.
How frequency capping works
A cap has two parts: a number of impressions and a time period, such as 2 per day, 5 per week or 10 per month. The DSP counts exposures for each identifier and stops bidding once the limit is hit.
Caps can usually be set at several levels:
Campaign level: controls total exposure across everything you run for a brand or product.
Budget or insertion order level: limits exposure for a specific flight or channel.
Line item or ad group level: fine-tunes exposure for a tactic, such as retargeting, where you might allow more contact than in prospecting.
Creative level: keeps a single ad from wearing out.
Accuracy depends on identity. If the same person uses a phone, laptop and TV with no shared identifier, each device may be counted separately. Cross-device graphs, logged-in data and household IDs on CTV help count people rather than browsers, while cookie blocking in Safari and Firefox makes caps harder to enforce there.
Why frequency capping matters
Less waste: the tenth impression to one person rarely does as much as the first impression to someone new.
Better user experience: overexposure leads to ad fatigue and can hurt how people see the brand.
More reach for the same budget: limiting repeat exposure pushes spend toward new users.
There is no universal right number. Awareness campaigns often use tighter caps to maximize reach, while consideration and conversion campaigns may allow more exposure. Test and read the results rather than copying a default.
Frequency capping vs reach
Reach is the number of unique people who saw your ad. Frequency is the average number of times each of them saw it. Total impressions = reach x average frequency, so with a fixed number of impressions, a lower frequency means more reach. Frequency capping is the lever that sets this balance. Too loose, and a small group sees your ad over and over; too tight, and you may not repeat the message enough for it to stick.
Frequency capping with AdGeeks
DV360, Amazon DSP and Adform all support frequency caps at more than one level. Our traders set caps by objective and channel, coordinate them across display, video and CTV, and adjust them based on reach and performance data. To plan a campaign with the right frequency, request access.
