Auction Decay
What is the definition of Auction Decay?
Auction decay occurs when Meta or TikTok expands delivery beyond the highest-intent cohort into colder pools. Hook Rate drops 40–50%, CPC rises, and margins compress — typically within 7–14 days of scaling a single creative.
Full editorial guide with benchmarks, diagnostics, and workflow:
Read the canonical guide →eonik heuristic application
Introduce net-new structural assets before decay curves inflect. Velocity — not bid tweaks — resets the auction signal.