Cumulative Layout Shift (CLS)
Measures visual stability to ensure a smooth user experience.
What is this check?
CLS is a Core Web Vital metric that measures the visual stability of a page. It quantifies how much content unexpectedly 'jumps' or shifts around as the page loads.
Why is it important?
Unexpected layout shifts are extremely frustrating for users. They can cause users to click on the wrong thing or lose their place while reading.
What is the impact?
CLS is a direct ranking factor. A high CLS score indicates a poor user experience and will negatively affect your SEO.