Google made Core Web Vitals an official ranking signal and in 2026 they continue to affect rankings across all search results. Sites with poor Core Web Vitals scores are at a disadvantage compared to competitors with better page experience scores, all else being equal.
Understanding the Three Core Web Vitals Metrics
Largest Contentful Paint measures how quickly the largest visible content element on a page loads. The target is under 2.5 seconds. Slow LCP is usually caused by slow server response times, unoptimised images, or render-blocking resources. Interaction to Next Paint measures the responsiveness of a page to user interactions. The target is under 200 milliseconds. Poor INP is typically caused by heavy JavaScript execution that blocks the browser’s main thread. Cumulative Layout Shift measures how much page content unexpectedly shifts while loading. The target score is under 0.1. CLS is commonly caused by images without defined dimensions, dynamically injected content, and web fonts that cause text reflow.
Measuring Your Core Web Vitals
Check your Core Web Vitals scores in Google Search Console under the Core Web Vitals report which shows real-world data from Chrome users on your site. Also test individual pages using Google PageSpeed Insights at pagespeed.web.dev which provides both lab data and field data along with specific recommendations for improvements.
Fixing Largest Contentful Paint
Improve LCP by upgrading to faster hosting if your server response time exceeds 600 milliseconds, optimising and compressing your hero images and above-the-fold images, preloading the LCP image element, and eliminating render-blocking CSS and JavaScript resources that delay content loading.
Fixing Cumulative Layout Shift
Fix CLS by always specifying width and height attributes on images and video elements, reserving space for dynamically loaded content like ads or embeds, using font-display: optional or swap in your web font CSS to prevent text shift during font loading, and avoiding inserting content above existing content after the page has loaded.
Professional Core Web Vitals Optimisation
Digital SEO Services provides technical SEO and Core Web Vitals optimisation for businesses across the USA. Book a free page experience audit at digitalseoservices.us.