Core Web Vitals: optimizing your site speed
Core Web Vitals: 3 acronyms that decide your Google ranking. LCP, INP, CLS: we explain it simply and how to optimize without being a developer.
Core Web Vitals: understand and optimize
Google rewards speed. Here is what to know and do.
LCP (display speed)
Largest Contentful Paint: time until main content shows. Target: < 2.5s.
INP (responsiveness)
Interaction to Next Paint: delay between click and reaction. Target: < 200ms.
CLS (stability)
Cumulative Layout Shift: prevent page “jumps” during load. Target: < 0.1.
Optimized images
WebP, lazy-loading, set dimensions: -50% weight.
Cache & CDN
LiteSpeed, WP Rocket, Cloudflare: the base of a fast site.
Clean code
Fewer plugins, minified JS, critical CSS: -200ms LCP.
How to proceed in practice?
A simple, step-by-step approach.
PageSpeed Insights + Lighthouse mobile = baseline.
Convert to WebP, lazy-load, fixed dimensions.
LiteSpeed Cache (free) or WP Rocket. Setup in 30 min.
Disable all non-essential plugins. Each plugin = more JS.
Free CDN serving your static files at the edge.
Before/after numbers: must show the gain.
FAQ — Core Web Vitals: optimizing your site speed
Answers to the questions we get most often.
Do CWV really impact SEO?
Yes since 2021, even more since INP in 2024. Official ranking factor.
What score to aim for?
At minimum “Good” (green) on all 3 mobile metrics.
Does my host matter?
Hugely. Cheap hosting = LCP > 4s. Aim for LiteSpeed with PHP 8.
Is WordPress always slow?
No, that is a myth. Well optimized, WordPress is faster than most no-code sites.
Is WP Rocket worth paying?
Free LiteSpeed Cache is as powerful if your host supports LiteSpeed. Otherwise WP Rocket.
How long to optimize?
2-3 hours to go from “Poor” to “Good” on most WordPress sites.
Got a project? Let’s talk.
Send us your business, goal and indicative budget. We reply with a clear plan.
Send my projectcontact@websteve.fr
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