Measure and define a bottom-line-the core web metrics, as stipulated by Google, for evaluating a website’s performance by real-world users’ experience. Largest Contentful Paint is the indicator of loading speed, first input delay is the moment when interactivity is available and Cumulative Layout Shift-it is visual stability. These indicators affect search ranking, and that’s why they are the very important aspects as far as SEO is concerned. Faster, smoother experiences have great user satisfaction and engagement, like those that meet the Core Web Vitals threshold. Possible ways of optimising Core Web Vitals include reducing server response times, optimising images, cutting back JavaScript, and optimising for mobile.