LCP (Largest Contentful Paint)
Largest Contentful Paint (LCP) measures how long it takes for the largest visible content element on a page – usually a hero image or a headline – to render completely, and Google uses it as the Core Web Vitals metric for perceived loading speed.
In practice
A good LCP value is under 2.5 seconds. Typical measures are optimising or compressing the largest image, removing render-blocking resources, and a fast hosting or CDN setup. Because LCP is closely tied to perceived load time, an improvement usually shows up directly in bounce rate and user satisfaction.