In Plain English
They are like three dashboard gauges for a page: how quickly the main view arrives, how promptly it responds and how steady the layout remains.
Why it matters
Understanding core web vitals helps you make clearer SEO decisions without mistaking one signal or metric for the whole picture.
Example
A team checks Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift for a slow product template, then tests improvements with field and lab data.
Common misunderstanding
Core Web Vitals are one part of page experience, not a complete quality score or a guarantee of rankings. Fast pages still need useful content.