Quick answer: Core Web Vitals are Google’s measurements of real-user page experience: Largest Contentful Paint (LCP) for loading speed, Interaction to Next Paint (INP) for responsiveness, and Cumulative Layout Shift (CLS) for visual stability. Good thresholds are LCP under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1. For Indian business websites, most problems come from heavy page builders, too many plugins and scripts, unoptimised images and slow shared hosting — all fixable.
The three metrics explained
| Metric | Measures | Good | Needs improvement | Poor |
|---|---|---|---|---|
| LCP | How fast the main content loads | ≤ 2.5 s | 2.5–4 s | > 4 s |
| INP | How quickly the page responds to taps and clicks | ≤ 200 ms | 200–500 ms | > 500 ms |
| CLS | How much the layout jumps while loading | ≤ 0.1 | 0.1–0.25 | > 0.25 |
Google evaluates these from real Chrome users, typically at the 75th percentile, and mobile performance matters most because most Indian users browse on phones, often on mid-range devices.
Why INP is the hardest metric
INP measures the delay between a user’s tap or click and the page visibly responding. Heavy JavaScript from page builders, sliders, chat widgets, pop-ups, analytics and tracking tags can block the browser’s main thread, making buttons and menus feel sluggish — especially on mid-range Android phones.
How to check your scores
- Google Search Console → Core Web Vitals report for real-user data across your site.
- PageSpeed Insights for individual pages, showing field data and lab diagnostics.
- Chrome DevTools Performance panel to find long tasks and heavy scripts.
Fixes that make the biggest difference
| Problem | Fix | Improves |
|---|---|---|
| Large images | Compress, use WebP/AVIF, set width and height | LCP, CLS |
| Slow hosting | Upgrade to better hosting, enable server caching | LCP |
| Too many plugins and scripts | Remove unused plugins, delay non-critical scripts | INP, LCP |
| Heavy page builders | Simplify layouts, reduce widgets and animations | INP, LCP |
| Chat widgets and trackers | Load after interaction or delay loading | INP |
| Late-loading fonts and ads | Preload fonts, reserve space for embeds | CLS |
| No CDN | Use a CDN for static files | LCP |
A quick WordPress checklist
- Use a caching plugin or host-level caching
- Deactivate and delete plugins you do not use
- Serve images in modern formats and lazy-load below-the-fold images
- Avoid sliders on the homepage hero
- Keep only essential tracking tags
- Test on a real mid-range Android phone, not just a laptop
Do Core Web Vitals affect rankings?
They are part of Google’s page experience signals, but relevance and content quality matter more. Their biggest impact is often on conversions: faster pages lose fewer visitors, which directly lowers your cost per lead. See landing page CRO.
Frequently asked questions
What are Core Web Vitals?
Google’s real-user measurements of loading speed (LCP), responsiveness (INP) and visual stability (CLS).
What is a good INP score?
200 milliseconds or less is considered good.
Do Core Web Vitals affect SEO rankings?
They are one of many ranking signals. Content relevance matters more, but speed strongly affects conversions.
How do I improve Core Web Vitals on WordPress?
Use good hosting and caching, optimise images, remove unused plugins and delay non-critical scripts.
Make your website faster
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