Largest Contentful Paint (LCP)

A Core Web Vital that measures the perceived loading speed of a page. It marks the point in time when the largest content element (usually a hero image or a large block of text) becomes visible within the viewport. LCP is a critical metric because it signals to the user that the main content of the page has arrived, answering their question, "Is it useful?". It is a primary focus for both user experience optimization and SEO.