Avoid late-loading layout shift

When to use it

When images, ads, embeds or fonts load late and shift the layout while visitors read or reach for the CTA.

How to run it

Reserve space for hero media and fonts so the CTA stays put, and compare engagement against the shifting control.

Why it works

Make the action easier to complete

A page that jumps while loading causes mis-clicks and costs trust. Keeping the layout stable leaves the CTA where the visitor expects it.

Source: Web-vitals layout-shift research