---
title: "Core Web Vitals – LCP, INP and CLS explained | Sweet Lava"
description: "Core Web Vitals are Google's three measures of page quality: loading, responsiveness, stability. See what they mean and why rankings feel them."
url: https://sweetlava.eu/en/glossary/core-web-vitals/
lang: en
alternate_pl: https://sweetlava.eu/pl/slownik/core-web-vitals/
---

Technology 

# What is Core Web Vitals?

Core Web Vitals are Google's three metrics of perceived page quality: LCP (how fast the main content loads), INP (how fast the page responds to interactions) and CLS (visual layout stability). They influence search rankings.

The "good" thresholds: **LCP** under 2.5 s, **INP** under 200 ms, **CLS** under 0.1\. Google measures them on real users (CrUX data), not in a lab – what counts is the actual experience, including on weaker phones and connections.

The usual culprits of poor scores: unoptimised images, JavaScript bloat, render-blocking fonts, ads and banners that shift content (CLS), slow hosting.

**Why bother:** beyond SEO impact, the same optimisations raise conversion – research consistently shows every second of delay costs sales. We design our sites for a full set of green scores from day one.

## Related services

- [ Custom website design & development → ](https://sweetlava.eu/en/services/websites/)

## Related articles

Development · 3 March 2026

## [ Core Web Vitals and site performance – why speed sells ](https://sweetlava.eu/en/blog/core-web-vitals-why-speed-sells/) 

A slow website loses customers twice, in Google (lower rankings) and after the visit starts (abandonment). We explain LCP, INP and CLS, and how to genuinely improve them.

## Related terms

- [Frontend](https://sweetlava.eu/en/glossary/frontend/)
- [JAMstack](https://sweetlava.eu/en/glossary/jamstack/)
- [SEO](https://sweetlava.eu/en/glossary/seo/)

## Planning a new company website?

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[ Get in touch ](https://sweetlava.eu/en/contact/?source=glossary-core-web-vitals)