Creative fatigue is the performance decline that hits a winning ad creative over time. The mechanism: as a creative runs in a campaign, the target audience accumulates exposures. The same users see the ad many times. Click-through-rate (CTR) drops, install rate per impression drops, effective CPI rises. The creative that delivered 2× IPM in week 1 might deliver 1.2× IPM by week 6 and 0.8× IPM by week 10.
Typical decay curve
- Weeks 1-2: peak IPM. Creative is novel to most viewers.
- Weeks 3-4: IPM starts declining 5-15% from peak.
- Weeks 5-8: IPM declines 20-40% from peak. Audience-saturation kicks in materially.
- Beyond week 8: creative is "exhausted" — diminishing returns, often net-negative ROI as continued spend pushes CPI above sustainable thresholds.
Decay speed depends on
- Audience size — small audiences saturate faster. Hyper-niche targeting causes rapid fatigue.
- Spend velocity — high daily spend exposes the audience faster than slow burn.
- Creative distinctiveness — generic-looking creatives fatigue faster than visually unique ones.
- Audience overlap with competitors — if your audience is also seeing 5 other apps' similar ads, the broader category-level fatigue accelerates yours.
Mitigation — continuous creative pipeline
- Always have new variants in development — never run only one creative. Maintain a steady production cadence (5-15 new variants per month for mid-sized programs, 50-100+ for large).
- Rotate creative sets — when a creative shows fatigue (15-25% IPM decline from peak), pause it. Let the audience "rest" for 3-4 weeks before re-introducing.
- Refresh variants — small variations on a winning creative (different hook, different color treatment, different copy) can extend useful life.
- Watch the metrics: IPM trend over 7-day rolling windows, CTR trend, CPI trend. Don't wait for a clear decline — trends signal fatigue earlier than absolute numbers.
- Test new concepts continuously — winning creatives don't last forever; the pipeline of next-winners has to be in development now.