Google's Core Web Vitals update, set to be a significant change in 2021, focuses on enhancing user experience by integrating three main metrics—Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS)—into its existing ranking signals. These metrics aim to improve page responsiveness, loading times, and visual stability, thereby influencing SEO rankings and user retention. Experts suggest optimizing website performance by improving mobile compatibility, defining display ad sizes, optimizing site speed, and enhancing hosting server responsiveness. Tools like PageSpeed Insights and Lighthouse are recommended for testing website compliance with Core Web Vitals standards. While this update does not override all other ranking signals, it emphasizes the importance of a seamless web experience, ultimately leading to reduced bounce rates and higher user engagement, which are crucial for business growth.