The Chrome team recently announced Core Web Vitals, a set of metrics related to speed, responsiveness and visual stability, to help site owners measure user experience on the web. Core Web Vitals is a set of real-world, user-centred metrics that quantify key aspects of the user experience.
We're combining the signals derived from Core Web Vitals with our existing Search signals for page experience, which are mobile-friendliness, safe-browsing, HTTPS-security, and intrusive interstitial guidelines, to provide a holistic picture of the quality of a user's experience on a web page.
The page experience signal measures aspects of how users perceive the experience of interacting with a web page. Optimizing for these factors makes the web more delightful for users across all web browsers and surfaces, and helps sites evolve towards user expectations on mobile. We believe this will contribute to business success on the web as users grow more engaged and can transact with less friction.
This new holistic picture of experiences will be incorporated into our ranking criteria.
We plan to incorporate more page experience signals on a yearly basis to both further align with evolving user expectations and increase the aspects of user experience that we can measure.
This information was released in May 2020 but Google agreed to pause in its release of this change because of COVID-19. These changes are going live in early 2021.