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SEO100/100 Lighthouse

Core Web Vitals: how Google scores load time – and why it grows your revenue

6 min read

Every second counts

Imagine your shop had a door that only opened slowly and jerkily. Some customers wait – most move on to the competition. That's exactly what happens online every day, just invisibly. Google measures this "door opening" with what are known as Core Web Vitals and makes it an official ranking factor.

What are Core Web Vitals?

Core Web Vitals are three metrics Google uses to assess the actual user experience of your website. Think of them as the inspection criteria for a good shop window.

LCP – Largest Contentful Paint

LCP measures how long it takes for the most important content to become visible – usually the large hero image or the headline. That's the first impression. If it takes too long, the visitor is already gone before they've even seen what you offer.

  • Good: under 2.5 seconds
  • Needs improvement: 2.5 to 4 seconds
  • Poor: over 4 seconds

INP – Interaction to Next Paint

INP measures how quickly your site responds to clicks and input. When a visitor clicks "Add to cart" and nothing happens, frustration sets in – and frustration is the fastest route to a bounce.

  • Good: under 200 milliseconds

CLS – Cumulative Layout Shift

CLS measures visual stability. You know the feeling when you're about to tap a button and at the last moment the page jumps because an image is still loading? That's a poor CLS score – annoying and trust-destroying.

  • Good: under 0.1

The direct link: load time is revenue

This isn't a technical nice-to-have but a hard business metric. The data is clear:

  • Google: When load time rises from 1 to 3 seconds, the bounce rate increases by 32%.
  • Amazon: A single extra second of load time would cost the company around $1.6 billion per year.
  • Deloitte: Just 0.1 seconds of faster load time measurably increased conversion rates in retail.
A slow website is a salesperson who leaves customers standing at the door. Every second saved works directly for your revenue.

How we achieve 100/100 on the Lighthouse score

The Lighthouse score is Google's official assessment tool. A perfect score of 100/100 isn't luck for us but the consequence of modern development.

  • Static delivery (SSG): We build pages in advance instead of recalculating them on every request. That pushes LCP to a minimum.
  • Automatic image optimization: Images are delivered in modern formats and exactly the required size – no unnecessary ballast.
  • Clean, lean code: No plugin sprawl, no superfluous code. Only what your site truly needs.
  • Global delivery: Your content is distributed worldwide and always loaded from the nearest location.

Conclusion

Core Web Vitals are the bridge between technology and revenue. Google rewards fast sites with better rankings, and your visitors reward them with more inquiries and purchases. Performance is therefore not a question of aesthetics but an investment with directly measurable returns.