08/21/2026
Core Web Vitals are three Google metrics that measure how your website actually feels to a real visitor: how fast the main content loads, how quickly the page reacts when someone taps or clicks, and how steady everything stays while the page comes together. They matter because they influence both where you rank in Google and whether visitors stay long enough to become customers. When these numbers are good, your site feels quick and trustworthy. When they are poor, people feel the lag even if they cannot name it, and they leave.
Core Web Vitals explained: what LCP, INP, and CLS measure, the targets to hit, why they affect Google rankings and conversions, and how to improve them.