The user experience can be measured Core Web Vitals
Web Vitals is an initiative from Google that provides guidance for quality signals to deliver a great user experience on the web.
Google's Chrome team launched Core Web Vitals, a set of metrics related to speed, response times and visual stability, to help website owners measure the user experience on the web.
Core Web Vitals primarily measures three aspects of the user experience
- First Input Delay (FID): the time it takes for your page's main content to load. It should charge for 2.5 seconds.
- Cumulative Layout Shift (CLS): A number that shows if the page "moves around" after loading. The figure should be lower than 0.1.
|English name||Loading||Interactivity||Visual stability|
|KPI||LCP (Largest Contentful Paint)||FID (First Input Delay)||CLS (Cumulative Layout Shift)|
|Guide value||Should be loaded in 2.5 seconds||Should be less than 100 milliseconds||Should be less than 0.1|
Google may add tags to search results that indicate which links provide a pleasant user experience. According to a study, only about 15% of the pages on the web currently pass the Core Web Vital test.