← DictionaryCore Web Vitals
also called LCP, CLS, INP
Google's measured set of loading, interactivity and layout-stability signals.
Google's own speed and stability scores.
What It Is
Core Web Vitals belongs to Website, specifically the Performance part of it. Stated plainly: google's measured set of loading, interactivity and layout-stability signals.
It is something measured and compared over time, so one reading in isolation tells you almost nothing. Used with that meaning, it stays a working tool rather than a talking point.
How It's Used
In practice, Core Web Vitals shows up in site builds, page structure and the technical decisions underneath them. In real work it sits close to Site Speed, Technical SEO and Image Optimisation. The practical test is whether it is measured the same way each period, against something.
Why It Matters
Core Web Vitals is one of those items that only becomes visible when it is missing. When it is unclear, the site still launches — it just quietly underperforms. Deciding it deliberately costs one conversation. Leaving it undecided costs several.
It is a score. Scores are only interesting when you compare them. Google's own speed and stability scores.
Termshift™
How the meaning shifts depending on who is using it, and where.
Inside the industry, Core Web Vitals is used tightly and assumed to be understood: google's measured set of loading, interactivity and layout-stability signals.
Away from the jargon, it is google's own speed and stability scores.
The Bottom Line
The practical takeaway on Core Web Vitals: google's own speed and stability scores. Judge it by that, not by how it sounds.