<b>Activity-based ad refresh vs fixed timer</b>

<b>Activity-based ad refresh vs fixed timer</b>

What it does: refreshes a slot on a user signal (scroll, click, route change) rather than a blind clock. Same billing event, much better viewability.

Setup effort: 4/5 — you hook real events and still enforce a minimum 30s gap and viewability check.

RPM lift seen: vs a naked timer, activity-gating lifts refresh viewability 15-25pts, which protects the CPM on those refreshed impressions. Net +5 to +12% over timer-only refresh.

Pros
— Refreshed impressions stay viewable = demand keeps bidding
— No wasted refreshes on idle/backgrounded tabs

Cons
— More moving parts; easy to under-refresh and lose the gain
— Some managers don't expose the hooks cleanly

Verdict: if you already refresh, upgrade timer to activity+viewability gating. If you don't refresh yet, start with the safer timer version first. Lift: ★★★☆☆ — Risk: ★★★☆☆
Best for: dashboards, readers, SPAs. Skip if your refresh is already viewability-gated.