Core Web Vitals (CWV)
Core Web Vitals are a set of specific, user-centric metrics created by Google to measure the real-world user experience of a webpage. They represent Google's official standard for "page experience" and are a direct ranking signal for SEO. The three Core Web Vitals are:
- Largest Contentful Paint (LCP): Measures loading performance.
- Interaction to Next Paint (INP): Measures interactivity.
- Cumulative Layout Shift (CLS): Measures visual stability.
Related web performance terms
- CDN (Content Delivery Network)
A CDN, or Content Delivery Network, is a globally distributed network of servers designed to deliver web content to users quickly and efficiently.
- CORS (Cross-Origin Resource Sharing)
CORS is a browser security feature that uses HTTP headers to manage whether a web page from one domain is allowed to fetch resources from another domain.
- CPU time
CPU time is the amount of time the Central Processing Unit (CPU) of a user's device spends processing the scripts and rendering a webpage.
- Cache
A cache is a high-speed, temporary storage layer designed to store copies of website files (like HTML, images, and scripts) closer to the user.