Every Meta campaign that has been running for a while goes through the same slow decline: results were good, then gradually were not, and nobody changed anything. The number that explains it is sitting in the reporting columns most people never add. Frequency, the average number of times each person has seen the ad, is the earliest honest warning that your creative is wearing out.
What is frequency telling you?
How many times the same people have been shown the same message. A frequency of 1.5 means the campaign is still reaching new people. A frequency of 5 means the average person in the audience has seen the ad five times, and the ones who were going to respond mostly have. Meta ads frequency rises naturally as an audience is exhausted, and the campaign keeps spending because you told it to.
What does creative fatigue look like in the numbers?
The pattern is consistent. Frequency climbs. Click-through rate falls, because the people still seeing the ad have already decided not to click. CPM rises, because Meta charges more to keep showing an ad people ignore. Cost per result climbs last, which is the point at which most advertisers notice. By then the campaign has often been declining for three or four weeks. If you had been watching frequency, you would have seen it in week one.
What are the thresholds?
Our rule of thumb, not a law. For cold prospecting, when weekly frequency passes about three and CTR has dropped by a third from its best week, the creative is done. Retargeting tolerates far more, often eight to ten a week, because those people are actively considering you. Small audiences fatigue fast: a 20,000-person local audience can burn through a creative in ten days on a modest budget, which is the everyday reality for a suburban service business and why campaign structure for service businesses matters more than it does for a national brand.
What should you change first?
Not the colours. Fatigue is about the idea and the first two seconds, so a new background on the same message buys you days, not weeks. Change the hook: the opening line or first frame. Change the angle: a different reason to care, a different objection answered, a different customer’s story. Change the format: a static image to a short video, a testimonial to a demonstration. The principles in writing ad creative for an AI-first feed apply here too; clear, specific creative fatigues slower than clever creative.
How many creatives should be live?
Enough that no single one carries the campaign. Three to five genuinely different concepts per audience, with the weakest replaced each fortnight, keeps blended frequency low and gives you a constant read on what resonates. A campaign with one hero ad is a campaign with a countdown on it.
What is not fatigue?
Seasonality. A trades campaign softening in the last week of December is not creative fatigue; it is Christmas. A sudden drop after a landing page change is not fatigue; it is the landing page. Check frequency first, because it is the cheapest diagnosis, then rule out the calendar and the site before you blame the creative. Our Ad Spend Health Check looks at all three side by side, and the Meta advertising team refreshes creative on a fortnightly cadence so the campaign never reaches the cliff.
Frequently asked questions
What frequency is too high for Facebook ads?
How often should ad creative be refreshed?
Does changing the image fix fatigue?
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