Core Web Vitals are a set of metrics that measure the most important things about how a website works for its users. These metrics are a big part of Google’s search algorithm and are used to figure out how good a website is and where it should rank in search results.

The three most important measurements in the Core Web Vitals metrics are the Largest Contentful Paint (LCP), the First Input Delay (FID), and the Cumulative Layout Shift (CLS). LCP checks how long it takes for a page’s biggest piece of content to load. FID tracks how long it takes for a page to process a user’s first action on it. CLS measures how often a page’s layout changes in a way that wasn’t planned.

These numbers are important because they have a direct effect on how the user feels. Users will have a better time on a website with a fast LCP, low FID, and few CLS than on one with a slow LCP, high FID, and many CLS. Because of this, Google uses these measurements to figure out how good a website is.

Website owners can make their pages work better for these metrics to improve Core Web Vitals. This can be done by making images and other page elements smaller, reducing the number of external scripts, and using “lazy loading” to load content only when it’s needed. 

Also, site owners can measure and keep track of their Core Web Vitals with tools like PageSpeed Insights and Lighthouse. These tools give detailed information about how each metric is doing and make suggestions for how to improve.

In conclusion, Core Web Vitals are a big part of the user experience and Google uses them to judge how good a website is. By making their sites better for these metrics, website owners can improve their search rankings and give their visitors a better experience.