Core Web Vitals: Key Metrics That Impact Google Rankings

Core Web Vitals are a set of three metrics Google uses to measure user experience on your website.

1. Largest Contentful Paint (LCP)

Measures how quickly the main content loads. Good: ≤ 2.5 seconds.

2. First Input Delay (FID)

Measures interactivity—how quickly your page responds to user interaction. Good: ≤ 100 milliseconds.

3. Cumulative Layout Shift (CLS)

Measures visual stability—how often elements shift during loading. Good: ≤ 0.1.

How to Improve

• Optimize and compress images
• Use lazy loading
• Minimize JavaScript blocking
• Set dimensions for images
• Use a CDN