Core Web Vitals

What Are Core Web Vitals?

Core Web Vitals are a set of specific performance metrics defined by Google to measure real-world user experience on web pages. They focus on three critical aspects of page quality: loading speed, interactivity, and visual stability. Since 2021, Core Web Vitals have been a direct ranking factor in Google Search.

The Three Core Web Vitals

Largest Contentful Paint (LCP) measures how long it takes for the largest visible element on the page — typically a hero image or heading — to finish rendering. A good LCP is under 2.5 seconds. Interaction to Next Paint (INP) measures the responsiveness of a page by tracking the delay between a user interaction (click, tap, or key press) and the next visual update. A good INP is under 200 milliseconds. Cumulative Layout Shift (CLS) measures unexpected layout movements during page load — for example, text jumping as images load or ads inject. A good CLS score is below 0.1.

Core Web Vitals and Webflow

Webflow sites benefit from a fast, globally distributed hosting infrastructure, but achieving excellent Core Web Vitals still requires attention to image optimization, font loading strategy, efficient use of animations, and minimal third-party script overhead. Monitoring tools like Google PageSpeed Insights, Lighthouse, and Search Console provide real-time CWV data.

Why Core Web Vitals Matter

Performance is not just a technical concern — it directly affects conversions, bounce rates, and search visibility. Sites that meet Core Web Vitals thresholds provide faster, smoother experiences and are rewarded with better positioning in Google's search results.