Repeated layout shifts can have a significant impact on the user experience of the website. That’s why Google has come up with the Core Web Vitals and Cumulative Layout Shift.
What is the Cumulative Layout Shift (CLS)?
The CLS describes one of the metrics of the Core Web Vitals. It measures unexpected shifts of the layout during the loading process of a web page. The CLS is determined by summing layout shifts in Session Windows. The better the value, the easier it is for the user to navigate the web page. This results in a better user experience, which is what CWV aims for.
Why is the Cumulative Layout Shift important?
A low CLS score is important for two reasons: first, unexpected layout shifts are frustrating for users and can cause them to leave the site. Second, Google uses Layout Shift as one of the metrics within Core Web Vitals. This means that a high CLS value of the website can have a negative impact on the search engine ranking.
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