CLS (Cumulative Layout Shift)
A measure of how much your page elements jump around while loading, causing frustrating misclicks and a sloppy feel.
Definition
CLS, or Cumulative Layout Shift, measures visual stability. You have probably experienced bad CLS yourself: you go to tap a button, and at the last second an ad or image pushes everything down, so you tap the wrong thing. Google scores CLS from 0 upward; under 0.1 is good, over 0.25 is poor. Bad CLS usually comes from images without specified dimensions, web fonts swapping in late, or ads injecting themselves above content. Fixing it makes your site feel polished and trustworthy, and Google rewards that with better rankings. Want a stable, professional build? Check pricing.
Why it matters in Miami
Miami service businesses running click-to-call buttons suffer most from CLS, since visitors often misdial when banners shift the layout. A stable layout is critical for capturing those mobile calls.
Example
A Doral plumber's site had a 0.34 CLS score because his hero image had no width set; specifying dimensions dropped CLS to 0.02 and inbound calls increased 15%.
Related terms
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