A frequency cap is a campaign setting that limits ad impressions per person over a time window, such as three per week. It is common on display, video and some social campaigns. Search ads do not need one, because they only show when someone searches. How caps are applied, and whether you can set them at all, differs by platform and campaign type.
Where you can set caps
Controls change, so treat this as a general picture and check current settings.
- Google Ads: frequency management on Display and Video campaigns, with limits per day, week or month.
- Meta: frequency controls on reach-and-frequency and some awareness buys; outcome-optimized campaigns manage frequency automatically.
- LinkedIn: few direct controls; LinkedIn applies its own limits per member.
- Programmatic platforms: detailed caps, often across campaigns.
Choosing a cap
Start with a cap that lets the message register without flooding people, then look at performance by frequency band if your platform reports it. Retargeting audiences tend to need tighter caps because they are small and see ads repeatedly.
Remember that caps work per identifier the platform can recognize. A person on two devices, or with cookies cleared, may count as two people.
Example
Capping a retargeting campaign
Hypothetical company Oakhurst sets a weekly cap on its Display retargeting campaign after noticing a small number of visitors receiving dozens of impressions. Cost per demo improves slightly and the budget reaches more of the audience.
Common mistakes
No cap on small audiences
A small audience with a large budget means heavy repetition. Either cap frequency or lower the budget.
Questions
It can reduce total impressions, but it often improves results per impression by spreading spend across more people. Test it on your own campaigns.
No. Each platform caps only its own impressions. Someone can hit your cap on Google and still see your ads on LinkedIn and Meta, so plan total exposure across channels.
