Core Web Vitals Reference

Core Web Vitals are three measurements Google uses to score the real-world experience of loading and using a page: how fast the main content appears, how quickly the page responds to input, and how much the layout jumps around while loading. They are Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. They affect both how users feel about a page and, as a ranking signal, how it is found. This reference explains each plainly and how to improve it.

What is inside

• 01-what-core-web-vitals-are.md the three metrics and why they exist
• 02-largest-contentful-paint.md how fast the main content appears
• 03-interaction-to-next-paint.md how quickly the page responds to input
• 04-cumulative-layout-shift.md how much the layout moves while loading
• 05-measuring-and-improving.md field versus lab data and where to start

License

MIT. Copyright (c) 2026 0xelitesystem.