What is Ad Frequency?

Ad frequency is the average number of times each person in your audience has seen your ad over a given period. It is the primary early-warning gauge for creative fatigue.

Formula: Frequency = Impressions / Unique Reach

How it works

Some repetition helps — most people need multiple exposures before acting — but past a point each additional view stops persuading and starts annoying. As frequency climbs on a stale creative, CTR typically slides and CPC and CPA drift up, because the auction penalizes ads the audience has tuned out. Frequency problems are worst with narrow audiences and small budgets stretched over long flights; broad targeting naturally keeps it lower.

What to watch

• Good: frequency staying modest while results hold — the audience still has fresh eyeballs
• Bad: frequency climbing while CTR falls and CPA rises in tandem — textbook fatigue
• Bad: negative feedback (hide/report rates) ticking up alongside repeated exposure

In practice

You cannot argue with fatigue; the only real fix is new creative before the old one burns the audience. Keeping a bench of variations ready — Polaris can generate a fresh batch of UGC-style ads inside Claude in one request — turns frequency from a crisis into routine rotation. See the full ecommerce ads glossary, or put it into practice with the Polaris AI UGC ad generator.