How to Increase Your Website Speed — A Practical Guide

Website speed isn’t just a technical concern — it directly affects how many visitors you convert into customers. Research consistently shows that a one-second delay in page load time can reduce conversions by several percentage points. Google has also used page speed as a ranking factor since 2010, with its Core Web Vitals update in 2021 making the connection between speed and search rankings even more direct.

The good news is that many of the biggest speed improvements don’t require advanced technical knowledge. This guide covers the most impactful things you can do, in roughly the order you should tackle them.

Test Your Speed First

Before making changes, baseline your current performance. These free tools give you actionable data: Google PageSpeed Insights (pagespeed.web.dev) — tests both mobile and desktop, reports Core Web Vitals, and provides specific recommendations. GTmetrix (gtmetrix.com) — detailed waterfall chart showing how every resource on your page loads, with a prioritised list of improvements. WebPageTest (webpagetest.org) — more advanced, but excellent for seeing how your site performs from different locations and connection speeds.

The Biggest Speed Wins

These are the most impactful improvements, ranked by typical effect: Optimise your images — oversized images are the most common cause of slow websites. Use modern formats (WebP), compress images before uploading, and specify image dimensions in HTML. A WordPress plugin like ShortPixel or Imagify can automate this. Enable caching — caching stores a pre-built version of your pages so the server doesn’t have to regenerate them for every visitor. On WordPress, WP Rocket or W3 Total Cache handle this. Most good hosts offer server-level caching too. Use a CDN (Content Delivery Network) — a CDN serves your static files (images, scripts, CSS) from servers geographically close to each visitor. Cloudflare offers a free tier that makes a noticeable difference. Minimise JavaScript and CSS — unused or unoptimised scripts slow down your page. Minification removes whitespace and comments; deferring JavaScript means it loads after the visible content rather than blocking it. Choose faster hosting — no amount of optimisation will fully compensate for slow hosting. Shared hosting on an oversold server has a ceiling. If you’ve done everything else and your site is still slow, the host is likely the bottleneck. Reduce third-party scripts — every chat widget, social media embed, and ad tracker adds loading time. Audit what’s loading and remove anything you don’t actively use.

Core Web Vitals Explained

Google’s Core Web Vitals are three specific metrics: Largest Contentful Paint (LCP — how fast the main content loads), Interaction to Next Paint (INP — how quickly the page responds to user input), and Cumulative Layout Shift (CLS — how stable the page is as it loads). PageSpeed Insights shows your scores for all three. Focus on LCP first, as it’s typically the most impactful and the most improvable. Xpose carries out performance audits for clients across Norfolk as part of our ongoing web support services.