Playbook: Monthly RPM decay check

Playbook: Monthly RPM decay check
What it does: a recurring 20-minute audit that catches silent revenue leaks before they compound.

Setup (effort 1/5):
— Pull session RPM month-over-month. Flag any drop over 8% not explained by traffic mix.
— Check fill rate per slot — a quiet fill drop usually means a stale floor or a dropped bidder.
— Recheck viewability; a layout/CMS change can silently push a slot below fold.
— Confirm no new CLS — theme updates love to remove your reserved heights.
— Audit refresh CPM decay (you tagged it, right?) and re-cap if cycles went unprofitable.

RPM lift seen: prevents the slow -10-20% creep most sites never notice.

Pros: cheap insurance, catches regressions. Cons: requires the discipline to actually run it.

Lift: ★★★★☆ — Risk: ★☆☆☆☆
Best for: anyone running a stable stack for 6+ months. Skip if you audit weekly already.