Website speed on Indian mobile networks: a practical Core Web Vitals checklist

Most of your visitors open your website on a phone, often on mobile data, often on a mid-range device. A site that feels fast on office Wi-Fi can feel slow to the people you actually want to reach.

Google measures this experience with Core Web Vitals, and it's worth understanding them.

The three Core Web Vitals

You can check your site with PageSpeed Insights and in the Core Web Vitals report in Google Search Console.

The fixes that matter most

1. Images

• Resize images to the size they're displayed at.
• Use modern formats like WebP or AVIF.
• Lazy-load images below the first screen.
• Always set width and height so the layout doesn't jump.

2. Fonts

• Use one or two font families, not five.
• Self-host fonts or preload the main one.
• Use font-display: swap so text appears immediately.

3. Scripts

• Remove plugins and widgets you don't use.
• Load chat widgets, heatmaps and trackers after the page is interactive.
• Avoid heavy sliders on the home page.

4. Hosting

• Use hosting with a content delivery network (CDN) so files are served from locations close to visitors.
• Enable compression and caching.

5. Layout stability

• Reserve space for banners, embeds and ads.
• Don't inject pop-ups that push content down.

Why it matters for leads

Speed affects whether visitors stay long enough to see your WhatsApp button. It also contributes to how Google evaluates page experience. Faster sites usually see more enquiries from the same traffic.

A 15-minute test

1. Run your home page and your most important service page through PageSpeed Insights on mobile.
2. Note LCP, INP and CLS.
3. Open the page on your own phone using mobile data and time how long until you can tap "WhatsApp".

If the numbers are red or the wait feels long, start with images. It's usually the biggest win for the least effort.