Case: mobile anchor unit on a news site

Case: mobile anchor unit on a news site

What it did: added a closable bottom anchor (320x50/320x100 flex) on mobile only, paired with the existing in-content stack.

— Setup effort: 1/5 (toggle in GAM + one slot)
— RPM lift seen: mobile page RPM from $9.20 to $11.05 (+20%), 1.1M mobile pv/mo
— The anchor alone earned $3.10 RPM at 92% viewability — highest-viewability unit on the page

Pros: dead simple, near-100% viewability, doesn't push content.
Cons: bounce rate ticked up 1.3% on article pages; close button must be obvious or you eat UX complaints. Don't stack it with a second sticky.

Lift: ★★★★☆ — Risk: ★★☆☆☆
Verdict: install it — it's the cheapest RPM win in this whole list. Best for: mobile-heavy content. Skip if you already run a sticky footer CTA there.