Largest Contentful Paint (LCP)
A Core Web Vital measuring how long it takes for the largest visible element to load.
Why It Matters
LCP directly correlates with perceived load speed, which affects both rankings and user satisfaction.
How It Works
LCP measures the render time of the largest image, video, or text block visible in the viewport. Google considers LCP good if it occurs within 2.5 seconds, needs improvement between 2.5-4 seconds, and poor above 4 seconds.
Real-World Example
Optimizing a hero image from 800KB to 150KB reduces LCP from 3.8s to 1.9s.
Common Mistakes
Not preloading the LCP element
Using unoptimized images as hero banners
Related Terms
A set of Google metrics measuring page loading speed, interactivity, and visual stability.
A Core Web Vital measuring how much page content shifts unexpectedly during loading.
A Core Web Vital measuring how quickly a page responds visually to user interactions.
Largest Contentful Paint (LCP) FAQs
What is a good LCP score?
Under 2.5 seconds is considered good by Google standards.
What causes poor LCP?
Slow server response, render-blocking resources, large unoptimized images, and client-side rendering delays.
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