This guide features everything you need to know about Google Core Web Vitals and how to optimize your BigCommerce site to stay ahead of the game. Dec 14, 2021•13 min In June 2021, Google commenced the rollout of a landmark algorithm update known as Core Web Vitals . If you haven’t already heard, the Google Core Web Vitals update rewards web pages that offer an enjoyable user experience. 88% of online shopperssay they wouldn’t return to a website after a bad user experience. According to Google, Core Web Vitals consists of “a set of real-world, user-centered metrics that quantify key aspects of the user experience.