Website performance has become one of the most important aspects of modern web development. Users expect pages to load quickly, respond smoothly, and remain visually stable while browsing. To help developers measure these qualities, Google introduced Core Web Vitals, a set of user-centered metrics that evaluate real-world page experience.
Rather than focusing only on technical benchmarks, Core Web Vitals measure how visitors actually experience a website. Optimizing these metrics can improve usability, increase visitor satisfaction, and support long-term website quality.
Largest Contentful Paint measures how long it takes for the largest visible content element—such as a hero image, banner, or main heading—to appear on the screen.
A good LCP score is generally 2.5 seconds or less.
Ways to improve LCP include:
Fast loading helps users access important content without unnecessary delays.
Interaction to Next Paint evaluates how responsive a webpage feels after a user interacts with it. This includes actions like clicking buttons, opening menus, or submitting forms.
Developers can improve INP by: