Largest Contentful Paint, or LCP, is one of the core Lighthouse Web Vitals. Along with First Input Delay (FID) and Cumulative Layout Shift (CLS), these metrics are used to measure how good, or bad, a user’s experience is with your web page. The LCP is the time it takes for the largest image or text block to render on the page. This is typically something like the hero image on your page. A good LCP time is under 2.5 seconds across desktop and mobile devices. Again, the sooner or faster your content loads, the faster the user can begin interacting with your page.
Preload Largest Contentful Paint Image
What is Largest Contentful Paint?
Benefits of Preloading Largest Contentful Paint (LCP)
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.