Core Web Vitals: is your website's speed driving customers away?

Why is your website's speed a money issue, not a tech issue?

Because a slow site loses customers before it even shows them your offer: some visitors abandon a page that takes too long to appear, especially on mobile, and every extra second of waiting increases the risk they leave. A visitor who moves on to a competitor rarely comes back. Google, for its part, includes page experience in its ranking signals: with comparable content, a fast page tends to rank better than a slow one. Speed is not a technical detail for developers to worry about, it is a direct revenue lever, just like your prices or your photos. The good news: it can be measured for free and fixed in almost every case.

What do the Core Web Vitals actually measure?

The Core Web Vitals are 3 indicators defined by Google to measure what a visitor actually feels: loading speed, responsiveness and visual stability. LCP (Largest Contentful Paint) measures how long the main content of the page takes to appear, usually a large image or a headline: the moment the visitor feels the page is loaded. INP (Interaction to Next Paint) measures responsiveness: the delay between a click or a keystroke and a visible reaction from the page. CLS (Cumulative Layout Shift) measures visual stability: those elements that jump around while the page loads and make you click the wrong thing. Three metrics, three sensations every internet user knows.

What are the thresholds for a green score?

Google's published thresholds are precise: an LCP under 2.5 seconds, an INP under 200 milliseconds and a CLS under 0.1 put your page in the good category. Beyond that, the page is rated needs improvement, then poor, and the experience degrades noticeably. Here are the three metrics at a glance:

How can you test your site for free in 2 minutes?

Open PageSpeed Insights, Google's free tool: paste your website address, run the analysis, and the verdict lands in under 2 minutes. Read the mobile tab first, since that is where most visits happen and where scores are toughest. The top of the report tells you whether your real visitors get a good experience (field data, available once the site has enough traffic); the score out of 100 below it comes from a lab test. Simple rule: aim for green on LCP, INP and CLS, the overall score is only an indicator. Test your homepage, but also your most visited pages.

What are the 6 most common causes of a slow website?

In the vast majority of cases, a slow site suffers from one or more of these 6 causes:

• Heavy images, delivered at full resolution when a compressed version would do;
• A bloated theme, packed with animations and features nobody uses;
• Too many plugins or extensions, each adding its own code to load;
• Underpowered hosting, which responds slowly as soon as traffic grows;
• Too many third-party scripts: widgets, trackers, chat tools, external fonts;
• No caching, forcing the server to rebuild everything on every visit.

The first two causes alone often explain a red LCP; third-party scripts and plugins mostly weigh on INP.

Quick fixes or full rebuild: how do you decide?

The rule is simple: if your site's foundation is sound, a few adjustments are enough; if the foundation itself is slow, rebuilding pays off more than endless tweaking. Adjustments include: compressing images, enabling caching, removing unused plugins, upgrading your hosting. A rebuild is warranted when: a bloated theme cannot be slimmed down, an old site was never designed for mobile, or scores stay orange despite every optimisation. Stubbornly patching a broken foundation often costs more in billed hours than a clean rebuild, from 490 € at Neting. And a well-run rebuild does not sacrifice your rankings, as our guide on redesigning your website without losing SEO explains.

How does Neting deliver green-score websites from 490 €?

Neting builds every site to pass the Core Web Vitals in green from day one: optimised images, lean code, active caching and properly sized hosting. The Essentiel package at 490 € covers a one-page or 3-page site with local SEO, live 5 days after the specs are approved; the Business package at 990 € goes up to 8 pages with booking and payment, where agencies typically charge 1,500 to 6,000 €. Optimised hosting at 29 €/month, maintenance included, keeps that performance over time: updates, monitoring and caching stay under control. Full details are on our website design page. Free quote, reply within 24h via the site's contact form.