Analyze performance, accessibility, best practices, SEO, resources, and optimization opportunities from one report.
Learn what each Core Web Vital measures, why it matters, and what you can improve to create a faster and more stable experience for your visitors.
LCP
Measures how quickly the largest visible content element becomes available to the visitor.
Good
≤ 2.5 seconds
INP
Measures how responsive a page is when visitors interact with buttons, links, forms, menus, and other controls.
Good
≤ 200 ms
CLS
Measures unexpected movement of visible content while the page is loading and being used.
Good
≤ 0.1
Each metric is compared against established performance thresholds. The goal is to keep the experience fast, responsive, and visually stable.
Focus on the areas that have the biggest effect on real-world page experience.
Optimize hero images, reduce server response time, remove render-blocking resources, and prioritize important content.
Reduce JavaScript execution, break up long tasks, minimize unnecessary event handlers, and keep the main thread responsive.
Reserve space for images and embeds, avoid inserting content above existing content, and control dynamic layout changes.
Test important pages after major design, content, JavaScript, or hosting changes to catch regressions early.
Core Web Vitals are user-focused performance signals designed to measure loading performance, interaction responsiveness, and visual stability. Improving these areas can create a smoother experience for visitors across mobile and desktop devices.
Performance results can vary depending on the device, network conditions, page content, server location, caching, and other factors.