How to Improve Website Speed and Core Web Vitals

Table of Contents

1. Why website speed and Core Web Vitals matter for Indian businesses
2. Understanding Core Web Vitals: LCP, INP and CLS
3. Common speed problems, causes and fixes
4. Step-by-step guide to improving website speed
5. Hosting, CDN and server-side factors
6. Image and media optimisation
7. Code-level fixes: JavaScript, CSS and third-party scripts
8. Mobile page speed for Indian search traffic
9. Pros and cons of DIY vs professional speed optimisation
10. Tools to measure and monitor Core Web Vitals
11. Indicative pricing for website speed optimisation in India
12. People also ask
13. Key takeaways

Why website speed and Core Web Vitals matter for Indian businesses

For businesses across Pune, Mumbai, Maharashtra and the rest of India, website speed is no longer a "nice to have" — it directly affects both Google rankings and revenue. Google confirmed Core Web Vitals as a page experience ranking signal, and on mobile, where the vast majority of Indian search traffic happens, slow loading speed is one of the fastest ways to lose both rankings and customers.

A visitor on a mid-range Android phone on a 4G connection in a tier-2 Indian city has very different patience levels than a desktop user on fibre broadband. If your homepage takes 6-8 seconds to load, most of that mobile audience has already left before your content even renders. Improving website speed is therefore both an SEO ranking factor and a direct conversion rate optimisation lever.

This guide covers how to improve website speed and Core Web Vitals scores step by step, whether you run a WordPress site, a custom-built platform, or an e-commerce store. If you need a professional audit, our website development team can review your site and provide a prioritised fix list.

Understanding Core Web Vitals: LCP, INP and CLS

Core Web Vitals are three specific, measurable aspects of user experience that Google tracks using real visitor data (field data) as well as lab testing tools.

Largest Contentful Paint (LCP)

LCP measures how long it takes for the largest visible element — usually a hero image, banner or headline — to render on screen. A slow LCP is most often caused by large unoptimised images, slow server response time, or render-blocking CSS and JavaScript loaded before the main content.

Interaction to Next Paint (INP)

INP measures how quickly your site responds when a visitor clicks a button, taps a menu, or fills a form. Heavy JavaScript execution, too many third-party scripts (chat widgets, ad trackers, analytics tags), and unoptimised event handlers are the usual culprits behind poor INP.

Cumulative Layout Shift (CLS)

CLS measures unexpected visual jumps — like text shifting down when an ad or image loads late without a reserved space. This is one of the most frustrating experiences on mobile and is usually fixed by explicitly setting width and height attributes on images and embeds.

Common speed problems, causes and fixes

Step-by-step guide to improving website speed

1. Run a baseline audit. Test your top 5 pages on Google PageSpeed Insights (mobile) and note LCP, INP and CLS scores.
2. Fix images first. Compress and convert to WebP, add lazy-loading for below-the-fold images, and set explicit width/height on every image tag.
3. Review your hosting. Check Time to First Byte (TTFB); if it is above 600ms, consider upgrading hosting or adding a CDN.
4. Enable caching. Turn on browser caching, server-side page caching, and object caching where supported by your platform.
5. Audit third-party scripts. Remove chat widgets, trackers or fonts you no longer need; load the rest asynchronously or defer them.
6. Minify and combine CSS/JS. Reduce the number of render-blocking files loaded before the main content appears.
7. Fix layout shift sources. Reserve space for ads, embeds and web fonts so content does not jump as the page loads.
8. Re-test on mobile. Confirm improvement using PageSpeed Insights and monitor Search Console's Core Web Vitals report over the following weeks using real visitor field data.
9. Set up ongoing monitoring. Check Core Web Vitals monthly, since a new plugin, image upload or ad script can quietly undo your gains.

Hosting, CDN and server-side factors

Server response time (TTFB) sets the floor for every other metric — no amount of front-end optimisation can compensate for a slow, overloaded, or geographically distant server. For Indian businesses, choosing hosting with data centres in India or a CDN with strong Indian edge locations meaningfully reduces latency for local visitors.

SSD-based hosting, HTTP/2 or HTTP/3 support, and server-side caching (like Redis or Varnish) are worth confirming with your host or developer. If your current shared hosting plan struggles under normal traffic, migrating to a faster host is often the single highest-impact fix available.

Image and media optimisation

Unoptimised images remain the single most common cause of slow LCP on Indian business websites — hero banners, product photos and team images uploaded straight from a phone or DSLR without compression. Convert images to WebP or AVIF, resize them to the actual display dimensions (not just visually scaled down with CSS), and lazy-load anything below the fold.

For video, avoid autoplaying background videos on the homepage where possible, or host them on YouTube/Vimeo and embed with a lightweight facade rather than the full embed script loading immediately.

Code-level fixes: JavaScript, CSS and third-party scripts

Every third-party script — live chat, marketing pixels, review widgets, font loaders — adds to the JavaScript your page must download, parse and execute. Audit these regularly and remove anything not actively contributing to conversions.

Defer non-critical JavaScript so it loads after the main content renders, minify and combine CSS/JS files to reduce request counts, and inline critical above-the-fold CSS where possible. These changes primarily improve INP and LCP together.

Mobile page speed for Indian search traffic

Since Google indexes the mobile version of your site first, and the majority of Indian users search and browse on mobile data connections, mobile page speed deserves priority over desktop. Test on an actual mid-range Android device on a throttled 4G connection, not just a resized desktop browser window, to get a realistic picture of what your customers experience.

Pros and cons of DIY vs professional speed optimisation

Tools to measure and monitor Core Web Vitals

• Google PageSpeed Insights — combines lab and field data, free, page-by-page.
• Google Search Console Core Web Vitals report — shows real-user field data across your whole site, grouped by URL pattern.
• Chrome DevTools Lighthouse — useful during development for lab testing before pushing changes live.
• GTmetrix or WebPageTest — additional detail on waterfall loading and render-blocking resources.

Indicative pricing for website speed optimisation in India

Approximate 2026 pricing for Indian businesses (plus GST, always confirm current rates):

• Basic speed audit and quick fixes (images, caching, plugin cleanup): approximately Rs. 8,000 - Rs. 25,000
• Full Core Web Vitals optimisation (code-level, hosting review, third-party script audit): approximately Rs. 25,000 - Rs. 75,000
• Ongoing monthly monitoring and maintenance: often bundled with SEO services retainers

People also ask

Is website speed the same as Core Web Vitals?

Not exactly — website speed is the overall experience, while Core Web Vitals are three specific, Google-measured metrics (LCP, INP, CLS) that quantify parts of that experience and directly factor into rankings.

Can I improve website speed without a developer?

Basic wins like image compression and enabling a caching plugin can often be done without a developer. Code-level fixes, hosting migration and third-party script audits usually need technical help to avoid breaking functionality.

How long does it take to see ranking improvement after fixing speed?

Google typically needs 28 days of real-user field data to update your Core Web Vitals status in Search Console, and ranking movement can take a few additional weeks beyond that.

Does improving website speed help e-commerce conversions?

Yes, significantly. Slow product and checkout pages are one of the leading causes of cart abandonment; faster load times directly correlate with higher completed purchases.

Key takeaways

• To improve website speed, focus first on images, caching and hosting — these give the fastest, largest wins.
• Core Web Vitals (LCP, INP, CLS) are a confirmed Google ranking factor, especially on mobile.
• Third-party scripts and unoptimised JavaScript are the most common cause of poor INP.
• Mobile page speed matters more than desktop for most Indian audiences.
• Speed optimisation improves both rankings and conversion rates, so it pays for itself.

Conclusion: speed is a compounding SEO and revenue advantage

Improving website speed and Core Web Vitals is one of the highest-leverage technical SEO investments a business can make — it improves rankings, reduces bounce rate, and increases conversions simultaneously. Most sites can move from "Poor" to "Good" within a few weeks of focused work on images, caching, hosting and script cleanup.

Mark Software, the technology brand of Elitemark Software Pvt Ltd based in Vishrantwadi, Pune, provides website speed audits, Core Web Vitals fixes and full website development services for businesses across Pune, Mumbai, Maharashtra and all of India. Explore our work across industries or browse the blog for more technical SEO guides.