The History of Core Web Vitals
October 13, 2025
Core Web Vitals measure user experience by assessing a website’s performance. This write-up is a history of how Core Web Vitals came to be based on my recollections from our work on it at Google from 2014 onwards. The initiative saved Chrome users over 30,000 years waiting with businesses seeing revenue and user-engagement lifts through optimizing for it, inclusive of 2025.
Addy Osmani, who was involved from the early days in the development of what became Core Web Vitals, charts its history and its impact.
