Largest Contentful Paint
LCP describes when the main content becomes visible. Large images, slow server responses or render-blocking resources can affect this experience.
WEBSITE PERFORMANCE GUIDE
A faster website feels better to use.
Understand what a speed check can tell you about loading, responsiveness and visual stability. This guide turns the main signals into practical areas to review on your website.
Website performance signalsLive overview
Page loadInteractionsVisual stability
LoadingResponsivenessLayout stability
WHAT TO MEASURE
Speed is more than one number.
A useful performance review looks at how quickly content appears, how promptly the page reacts, and whether the layout stays steady while loading.
Interaction to Next Paint
INP reflects how promptly the page responds to user interactions. Heavy scripts and busy main-thread work can make controls feel delayed.
Cumulative Layout Shift
CLS describes unexpected movement while a page loads. Reserved space for images, embeds and late-loading content can help keep layouts steady.
WHERE TO START
Work through the common causes.
After a speed check, review the parts of the site that most affect the visitor’s experience. Start with the biggest issues you can confirm.
Images and page assets
Resize and compress oversized images; remove resources that are unused or duplicated.
Scripts and styles
Review third-party scripts and large files that delay rendering or block interaction.
Server and caching
Check response time, caching rules and delivery settings for frequently visited pages.
Mobile experience
Repeat checks on mobile-sized pages and verify buttons, navigation and content remain responsive.
XML sitemap creation
Create an XML sitemap to give search engines a clear list of your important pages, then keep it updated as your website changes.
Test results can vary with the device, connection, location, page state and whether the measurement uses simulated or real-user data. Compare like-for-like runs and focus on patterns, not a single score.