Core Web Vitals are Google's set of metrics that measure user experience. They became ranking factors in 2021 and remain important today.
What Are Core Web Vitals?
Three metrics matter: Largest Contentful Paint (LCP) measures loading speed. First Input Delay (FID) measures interactivity. Cumulative Layout Shift (CLS) measures visual stability.
LCP — Loading
LCP should be under 2.5 seconds. It measures when the main content loads. Slow hero images are the most common cause of poor LCP. Compress and optimize your largest images.
FID — Interactivity
FID should be under 100 milliseconds. Heavy JavaScript and slow server response cause delays. Minimize third-party scripts and use efficient code.
CLS — Visual Stability
CLS should be under 0.1. Layout shifts happen when images or ads load after content. Set explicit dimensions on all images and embeds to prevent shifting.
How to Check Your Scores
Use Google Search Console's Core Web Vitals report. Run tests on PageSpeed Insights. Monitor real-user data from Chrome User Experience Report.
Fixing Issues on Shopify
Optimize images, remove unnecessary apps, use a lightweight theme, and reduce custom code. Shopify-hosted stores already benefit from solid infrastructure.
Good Core Web Vitals mean happier visitors and better rankings.