What Is LCP (Largest Contentful Paint)?

Purpose

Define Largest Contentful Paint (LCP), explain why it matters for dealer sites, and describe what affects it.

What LCP measures

LCP measures how long it takes for the largest visible element in the viewport to finish rendering. This is often the moment when a page feels like the main content has loaded.

Google reference:

LCP guidance https://web.dev/lcp/

Common LCP elements on dealer sites

LCP is often:

A hero banner image on the homepage
A vehicle photo on a VDP
A large heading or featured content block

What can make LCP slow

Common contributors include:

Slow server response time (TTFB)
Large images that start downloading late
Heavy JavaScript that blocks rendering
Third party scripts that compete for main thread time

How Speed Layer relates to LCP

Speed Layer can help by:

Reducing early contention from selected third party scripts
Preloading likely LCP resources on repeat visits

Speed Layer does not directly change image file size or server speed.

How Speed Layer Helps Largest Contentful Paint (LCP)
What is TTFB (Time to First Bite)?
How Speed Layer Improves Page Load Speed