Sticky Sidebar vs Mobile Anchor: Different Tools

Sticky Sidebar vs Mobile Anchor: Different Tools

People treat these as the same 'sticky' lever. They're not — and on desktop the sidebar usually beats the anchor.

What it does — pins a 300x600 in the sidebar as the user scrolls the article.
Setup effort (2/5) — position:sticky CSS + a max-scroll stop so it doesn't overlap the footer.
RPM lift seen — sticky 300x600 earns +15-25% over a static sidebar 300x250, thanks to sustained viewability on a half-page unit.

Pros — huge canvas, long viewability, no content obstruction on desktop.
Cons — desktop-only (kills on mobile narrow layouts); a too-tall unit on short articles looks broken.

Lift: ★★★★☆ — Risk: ★★☆☆☆
Best for: desktop-heavy long-form. Skip if 80%+ of your traffic is mobile — spend the effort on the anchor instead.