Prime Web Services
Core Web Vitals Optimization in Kolkata
Core Web Vitals are Google's measures of loading, responsiveness and stability. We find why your pages fail LCP, INP or CLS and fix them, so your site feels fast to real visitors and meets Google's good thresholds.
What Core Web Vitals mean for your business
Core Web Vitals measure how a page feels to a real visitor: how fast the main content appears, how quickly it responds to a tap and whether it jumps around. Google includes them in its page experience signals, and they also decide whether visitors stay.
Prime Web Services fixes Core Web Vitals for businesses across Kolkata, from our New Town office. For broader speed work, see our website speed optimization services in Kolkata, and for new builds see our web development company in Kolkata.
What you get
- A baseline of your current scores
- A diagnosis for each failing metric
- Fixes for LCP, INP and CLS
- Testing on real devices
- Before and after comparison
- Ongoing monitoring if you want it
The three Core Web Vitals
Pages are judged on real visitor data, so aim for the Good column on mobile.
| Metric | What it measures | Good | Needs improvement | Poor |
|---|---|---|---|---|
| LCP (Largest Contentful Paint) | How fast the main content appears | 2.5 s or less | 2.5 to 4 s | Over 4 s |
| INP (Interaction to Next Paint) | How quickly the page responds when someone taps or clicks | 200 ms or less | 200 to 500 ms | Over 500 ms |
| CLS (Cumulative Layout Shift) | How much the page jumps around as it loads | 0.1 or less | 0.1 to 0.25 | Over 0.25 |
How we fix each metric
Specific fixes for specific failures, ranked by impact.
Fixing LCP
- Compress the main image and serve it in a modern format at the right size
- Never lazy-load the main image, and give it loading priority
- Improve server response with better hosting, caching and a CDN
- Remove or defer render-blocking CSS and JavaScript
- Cut unnecessary redirects
Fixing INP
- Reduce and defer JavaScript so the page is ready to respond
- Break up long scripts that freeze the page
- Delay third-party scripts such as chat widgets and trackers
- Remove heavy plugins and page-builder scripts you do not use
- Optimise the code that runs when someone taps or clicks
Fixing CLS
- Set width and height on images, videos and embeds
- Reserve space for banners, ads and pop-ups
- Avoid adding content above what is already on screen
- Load fonts so text does not jump when they arrive
- Make sure late-loading elements do not push the page down
Lab data vs field data
Two kinds of data appear in speed tools, and they answer different questions.
- Lab data: a simulated test on one page, useful for finding problems and checking fixes quickly
- Field data: measurements from real visitors over time, which is what Google uses to assess your site
How to check your own scores
- Open PageSpeed Insights and test your key pages on mobile
- Look at the field data section, which shows real visitors, not just a lab test
- Open the Core Web Vitals report in Google Search Console to see groups of URLs that need work
- Remember that field data is a rolling 28-day window, so improvements take weeks to show
- Retest after every change and compare with your baseline
Fixes differ by platform
WordPress and WooCommerce
Theme and plugin weight, caching, image handling and database cleanup are the main levers.
Shopify
App scripts, theme code and image sizes matter most, since hosting is handled for you.
Custom builds
Bundle size, server response and how scripts load decide the scores.
What clients say
"Our new site loads in under two seconds and enquiries have gone up noticeably. Prime Web Services delivered exactly what they promised."
Our Core Web Vitals process
1. Baseline
We record your current Core Web Vitals in PageSpeed Insights and Search Console.
2. Diagnose
We find the cause of each failing metric on your key page types.
3. Fix
We apply the fixes for LCP, INP and CLS in order of impact.
4. Verify
We retest on real devices and compare with the baseline.
5. Monitor
We keep watching your field data so scores stay in the green.
Rated by our clients
What Kolkata businesses say on Google
Recent web design and development projects
Examples of our work. Browse the full portfolio on our projects page.
Greenbox Group SG
A fast, modern corporate website built to strengthen the group's online presence.
Neuro Nova
A custom-built website engineered for speed, clarity and conversions.
Adesca Greenbox
A clean, brand-led website design that reflects a premium identity.
Greenbox DTS
A polished, responsive website design crafted for a seamless user experience.
Core Web Vitals pricing
We quote after an audit, because the work depends on your platform and what is failing. Core Web Vitals optimization is included in our Corporate / Custom package from ₹45,000 and in every new build.
See website development packages in Kolkata. To keep scores healthy, our care plans start at ₹5,000 a month and include speed monitoring. See also our website maintenance company in Kolkata page.
Scores help search, not replace it
Good Core Web Vitals are one ranking signal among many. Pair them with strong content and links through our SEO agency in Kolkata service.
Core Web Vitals FAQs
What are Core Web Vitals?
They are Google's three measures of real user experience: LCP for loading, INP for responsiveness and CLS for visual stability.
Do Core Web Vitals affect Google rankings?
Yes, they are part of Google's page experience signals. They are one of many ranking factors, so good scores help but do not guarantee rankings.
What is a good Core Web Vitals score?
A good score is LCP of 2.5 seconds or less, INP of 200 milliseconds or less and CLS of 0.1 or less, measured on real visitors.
What replaced FID?
INP, which measures how quickly the page responds to all interactions, replaced FID as a Core Web Vital in March 2024.
Why do my PageSpeed score and Search Console report differ?
PageSpeed Insights shows a lab test and, where available, field data. Search Console shows field data from real visitors over a rolling 28-day window, so the two can differ.
How much does Core Web Vitals optimization cost in Kolkata?
We quote after an audit, because the work depends on your platform and what is failing. Core Web Vitals optimization is included in our Corporate / Custom package from ₹45,000. See website development packages in Kolkata.
How long before my scores improve?
Lab scores improve as soon as fixes go live. Field data in Search Console updates over about 28 days, so it takes a few weeks to show.
Can you fix Core Web Vitals on my existing site?
Yes. We audit and fix existing sites on WordPress, Shopify, WooCommerce and custom builds. See website speed optimization services in Kolkata.
Related services
Website maintenance company in Kolkata
Updates, security and backups.
Website speed optimization services in Kolkata
Fix slow pages.
Website maintenance cost in Kolkata
Care plans from ₹5,000 a month.
Ready to get your Core Web Vitals into the green?
Tell us your website address and we will tell you which metrics fail and why.
Prime Web ServicesSukhobristi Shapoorji Pallonji Housing Complex, Action Area III, Newtown, New Town, West Bengal 700135
info@primeweb.services