How to Optimize Core Web Vitals

Overview

Core Web Vitals are Google's speed metrics that evaluate page performance:

• Largest Contentful Paint (LCP): Measures loading performance (aim for <2.5 seconds).
• Interaction to Next Paint (INP): Measures page responsiveness (aim for <200ms).
• Cumulative Layout Shift (CLS): Measures visual stability (aim for <0.1).

Detection Logic

CrawlSage queries the Google Chrome UX Report (CrUX) API and uses Lighthouse tests to calculate these metrics.

How to Fix

1. **LCP:** Defer non-critical scripts, compress images, and use modern formats like WebP or AVIF.
2. **CLS:** Set explicit width and height dimensions on all images and video tags.
3. **INP:** Reduce JavaScript execution payloads and defer heavy tracking scripts.

Frequently Asked Questions

• Are Core Web Vitals ranking signals?

  Yes, Google uses these metrics to rank pages, prioritizing fast, visually stable websites.

Related Guides

• How to Run a Performance Audit