Read the three measures in plain words
Largest Contentful Paint, or LCP, asks when the main visible content appears. Interaction to Next Paint, or INP, asks how quickly the page responds when someone uses it. Cumulative Layout Shift, or CLS, tracks unexpected movement. Google recommends LCP within 2.5 seconds, INP below 200 milliseconds and CLS below 0.1 for a good experience.
Start with real visitors and important templates
Open the Core Web Vitals report in Search Console and choose mobile or desktop. It groups similar URLs and reports field data from real visits when enough data exists. A page without enough field data may still have a problem; test its template directly with PageSpeed Insights or browser tools. Check the service and contact paths before a rarely used archive page.
Match each measure to a practical fix
A slow hero image or server response can hold back LCP. Heavy scripts can make a booking button feel stuck and hurt INP. Images without reserved dimensions and late banners can move the page and raise CLS. Ask the developer to show the before and after measurement on the same page and device type.
Keep the business goal in view
Use the measures to improve a page people rely on. A perfect lab score is not proof that a page answers the search or earns inquiries. Google says its ranking systems use Core Web Vitals, but good report scores alone do not guarantee a top position.
Related help
Sources for technical rules
Google's documentation is the authority for its own search systems. This guide explains the work in our words.