How Frequency Caps Work
A frequency cap sets a maximum impressions-per-user limit over a defined time window. For example, '3 impressions per user per 7 days' means no one will see your ad more than three times in a week. On Meta Ads, frequency caps are available for Reach and Brand Awareness campaigns. For other objectives, Meta manages frequency automatically. On Google Display Network, you can set caps at the campaign, ad group, or ad level. Frequency caps balance reach (seeing your ad enough to remember it) with fatigue (seeing it so often it becomes annoying).