Core Web Vitals Guide: How to Achieve 90+ PageSpeed Scores

What Are Google Core Web Vitals?

Core Web Vitals are a set of specific real-world user experience metrics defined by Google to measure loading speed, visual stability, and interactive responsiveness:

• Largest Contentful Paint (LCP): Measures perceived loading speed. Marks the time when the main content of a page has likely loaded. Target: Under 2.5 seconds.
• Interaction to Next Paint (INP): Measures overall page responsiveness to user interactions (clicks, taps, key presses). Target: Under 200 milliseconds.
• Cumulative Layout Shift (CLS): Measures visual stability and unexpected layout shifting during page load. Target: Under 0.1.

Top Optimization Techniques for High Performance

• Minify HTML, CSS, and JS: Strip comments and unnecessary whitespace to reduce byte transfer size.
• Eliminate Render-Blocking Resources: Load external JavaScript with defer or async attributes so HTML rendering isn't blocked.
• Preconnect to Critical CDNs: Use <link rel="preconnect" href="..."> for third-party font and CDN origins.
• Set Explicit Width & Height on Images: Always provide dimension attributes on <img> tags to eliminate CLS layout jumps.