Reach & delivery
What is Frequency capping?
Frequency capping is limiting how many times the same person sees your ad within a set period, so you don't wear out an audience by showing them the same creative too often. On Meta you can set explicit frequency caps on reach and awareness campaigns, and the goal is to slow the build-up of frequency that leads to ad fatigue — declining CTR and rising CPM and CPA as people tire of seeing the same ad.
Example
You run a brand-awareness campaign and set a cap of once every three days. Without it, a small audience might see the ad five or six times a week, frequency climbs fast, CTR halves and CPM creeps up — classic fatigue. The cap spaces exposure out, keeping the ad fresher for longer on the same pool of people.
Why it matters
On small audiences like retargeting pools, frequency builds quickly, and once it climbs the same people see the same ad repeatedly — CTR falls, CPM and CPA drift up, and returns diminish even though nothing about your targeting changed. Frequency capping is one lever against that decay, protecting a limited audience from being burned out before your creative refresh is ready. It manages exposure; it doesn't replace the need for new creative.
How to use and improve it
Use explicit frequency caps on reach and awareness campaigns where the objective supports them, and lean on creative rotation, wider audiences, and exclusions elsewhere since conversion-optimised campaigns give you less direct control over frequency. Watch frequency alongside CTR: when frequency rises and CTR falls together, capping buys time but fresh creative is the real fix. On small retargeting pools especially, cap exposure and rotate creative before fatigue erodes your CPA.
Frequently asked questions
Can I set a frequency cap on any Facebook campaign?
Not directly on every one. Explicit frequency caps are available on reach and awareness objectives; conversion-optimised campaigns give Meta more control over delivery, so there you manage frequency indirectly through audience size, creative rotation and exclusions rather than a hard cap.
What's the difference between frequency and frequency capping?
Frequency is the metric — the average number of times each person saw your ad (impressions ÷ reach). Frequency capping is the control you apply to limit how high that number is allowed to climb over a chosen period.
Does frequency capping prevent ad fatigue?
It slows fatigue by stopping the same people from seeing an ad too often, but it doesn't cure it. Once a creative has run its course, capping only delays the decline — refreshing the creative is what actually re-earns attention.
What frequency cap should I set?
There's no universal number — it depends on audience size, campaign length and how much you're spending. Rather than copy a benchmark, watch the frequency at which your CTR starts falling and CPA rising, and cap below that threshold.
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