Cumulative Layout Shift
Cumulative Layout Shift (CLS)[1] is a performance metric introduced in 2020 by Lighthouse to measure the perceived visual stability of a web page load[2][3]. CLS measures the unexpected shifting of web elements while the page is being rendered. Shifting may cause an upside or downside of the page, leading to a bad user experience.
Mostly, CLS is caused by unexpected DOM loads inside a web page, such as ads and videos.
Now, CLS is considered a major factor to decide search ranking of a page in Google Search[4]
References
- ↑ "Cumulative Layout Shift (CLS)". web.dev. Retrieved 2021-10-03.
- ↑ DIGITAL MARKETING SUCCESS IDEAS VALUE INFORMATION. RMN. Search this book on
- ↑ Verou, Lea; Lilley, Chris; Andrew, Rachel; Kadlec, Tim; Meiert, Jens Oliver; Rosu, Catalin; Devlin, Ian; Levien, Raph; Pamental, Jason (2020-12-09). The 2020 Web Almanac: HTTP Archive's annual state of the web report. HTTP Archive. Search this book on
- ↑ 631shares; 34kreads. "Cumulative Layout Shift – Overview of 2021 Google Ranking Factor". Search Engine Journal. Retrieved 2021-10-03.
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