Website speed: how to make your site load fast (and why it matters)

When a page is slow to load, people don't wait: they go back to Google and open the next result. That costs you customers even if you rank well. Google also measures the real experience of people visiting your site and takes it into account as one of its signals.

The good news is that most slow sites are slow for a handful of reasons, and almost all of them can be fixed. This guide covers how to measure your site's speed and what to improve first.

Why speed matters

• People leave: on mobile, on data or with a weak signal, every second of waiting makes it more likely someone gives up.
• Fewer conversions: forms, WhatsApp buttons and carts that respond slowly frustrate people.
• SEO: Google uses Core Web Vitals as part of how it evaluates page experience. It's not the most important factor (content is), but between two similar pages, the faster one has an edge.

How to measure it

PageSpeed Insights

Go to pagespeed.web.dev, enter your page's address and check:

• Real user data (if your site gets enough traffic): how people who visited in the last 28 days actually experienced the load.
• Lab diagnostics: a simulated test with specific recommendations.

Always check the Mobile tab: it's the toughest test and where most searches happen.

The three key metrics (Core Web Vitals)

Metric	What it measures	Good
LCP	How long the main content takes to appear	Under 2.5 s
INP	How quickly the page responds to a tap or click	Under 200 ms
CLS	Whether elements move while loading	Under 0.1

You can also see them across your whole site in Google Search Console's Core Web Vitals report (see how to use Google Search Console).

The improvements with the most impact

1. Lightweight images

The most common cause of slowness. A photo taken on a phone can weigh several megabytes; on the web, the same image can look just as good at a fraction of the size.

• Resize to what's actually displayed on screen.
• Use modern formats like WebP or AVIF.
• Compress without visible quality loss.
• Lazy-load images further down the page.
• Set width and height on every image so the page doesn't "jump" while loading.

2. Fewer plugins and third-party scripts

Every plugin, chat widget, social button, map, tracking pixel or extra font adds weight and time. Check what you actually use and remove the rest. Load what you do need only when it's needed, not upfront.

3. Good hosting

If the server is slow to respond, nothing else is enough. Cheap, overloaded hosting can be the difference between a fast site and a slow one. Look at the server response time (TTFB) in PageSpeed Insights.

4. Caching and compression

• Caching: storing ready-made versions of pages so they aren't built on every visit.
• Compression (gzip or Brotli) for your site's text.
• A content delivery network (CDN), if you have visitors from several countries.

5. A design built for mobile

Heavy sliders, background videos and decorative animations look great on a powerful computer but punish phones. Prioritize getting the main content and the contact button on screen immediately.

6. Maintenance

Pending updates, abandoned plugins and databases full of old revisions slow a site down over time. Review it every so often.

Common mistakes

• Uploading photos straight from the camera, without resizing.
• Installing a plugin for everything.
• Only testing on desktop.
• Chasing a perfect 100 score instead of improving the real experience.
• Changing your design without checking speed before launch.

Frequently asked questions

What PageSpeed score do I need?

More important than the score is having green Core Web Vitals in real user data. A high lab score helps spot problems, but it isn't the goal in itself.

Does speed directly improve my Google ranking?

It's one of many signals. A fast site won't make up for weak content, but a very slow site can lose visitors and opportunities to competitors.

Is my platform (WordPress, Shopify, Wix) slow?

Any of them can be fast or slow. The theme, plugins, images and hosting matter more than the platform.

Want help speeding up your site?

Our Technical SEO & Content plan includes reviewing and improving speed. See our prices or start with an SEO audit. If your site needs rebuilding, our sister team WEB.CR builds fast sites from day one.