Web performance is no longer only a developer topic. For visitors, a fast website feels trustworthy. For Google, perceived speed helps assess page quality. Core Web Vitals measure that experience.
LCP, CLS and INP in plain language
LCP measures how quickly the main visible content appears. CLS measures visual stability. INP measures how quickly the page reacts when a user clicks, taps or types.
Why INP is more demanding than FID
FID focused on the first interaction. INP looks at interactions throughout the visit. A website can appear loaded but still feel slow if JavaScript blocks the browser or third-party scripts delay responses.
Practical levers
Reduce unnecessary JavaScript, review third-party scripts and optimize hero images. These actions improve both user comfort and search performance.
A lightweight native PHP architecture without a heavy JavaScript framework gives more control over these metrics, which is a strong advantage for a premium showcase website.