Welcome to the recap thread for “Using Core Web Vitals to Build a Quality User Experience” with Salvatore Denaro and Katherine Rudik from Google. Salvatore is a Web Ecosystem Consultant, and Katherine leads Strategic Web Partner development efforts.
Join the follow-up discussion by leaving a question or comment below.
Users have performance expectations when they visit your website.
Site developers try to give users a great experience while reaching business goals.
Core Web Vitals can help quantify the user experience of your site.
Core Web Vitals are essential metrics for delivering a great user experience.
Loading: Largest Contentful Paint (LCP)
Interactivity: First Input Delay (FID)
Visual Stability: Cumulative Layout Shift (CLS)
Largest Contentful Paint (LCP) measures loading performance render time of the largest content element (image or block of text) visible within the viewport.
What causes poor LCP?
First Input Delay (FID) measures interactivity, the time from when a user first interacts with the page, until the time when the browser can respond.
What causes poor FID?
Cumulative Layout Shift (CLS) measures visual stability; the sum of all unexpected layout shifts occurring throughout the lifespan of the page.
What causes poor CLS?
Why not FCP, TTFB, and other metrics?
You can still use them!
Three important takeaways:
Numbers are not magic. They require context. Consider a three-legged stool:
Include Core Web Vitals alongside your favorite tools:
Getting started with Core Web Vitals:
There are two methods to measure performance data:
Lab data is collected in a controlled testing environment
Field data or RUM measures real-world experience with site visitors
Measure Core Web Vitals as both Lab and Field data
Debunking common myths about performance
PageSpeed Insights helps you understand how real-world Chrome users experience your site
Lighthouse helps you audit a site against modern performance best practices
Manage all your projects, clients, sites, and products with the Hub from GoDaddy Pro. Learn more and sign up for free.