SEO & performance
Core Web Vitals
Core Web Vitals are three metrics Google uses to describe how a page feels to load and use: how quickly the main content appears, how responsive the page is to input, and how much the layout shifts while loading.
The three are Largest Contentful Paint, which measures when the biggest visible element has rendered; Interaction to Next Paint, which measures the delay between an interaction and the screen responding; and Cumulative Layout Shift, which measures unexpected movement of content as the page loads. Each has a threshold Google considers good.
They matter for two reasons. They are a minor ranking signal, which is the reason usually given. They are also a fair description of whether a page is pleasant to use, which is the reason that matters. A page that shifts under the reader or takes three seconds to show its headline loses people whether or not Google is watching.
The usual causes are unoptimised images, fonts that block text, third-party scripts and content injected after load without reserved space. All four are build decisions. A well-built site passes without a performance project; a poorly built one needs a project to pass.
Webflow performance optimisationSEO & performance