Website Speed Optimisation: Practical Ways to Make Your Site Faster

Website speed optimisation is the work of reducing how much a page has to download and process before visitors can see and use it. In practice, most slow business sites are held back by the same handful of causes: oversized images, too many third-party scripts, heavy fonts, poor caching and slow server responses. Measure first, fix the largest causes, then measure again.

This guide focuses on techniques. If you want to understand the metrics Google reports — LCP, INP and CLS — start with Core Web Vitals explained for business owners, then come back here for the fixes.

Start by measuring the right pages

Do not test only the homepage. Pick the pages that matter commercially: your top service pages, the landing pages your ads send traffic to, and your highest-traffic articles or product pages.

Useful free tools:

• PageSpeed Insights shows lab results and, where Google has enough data, real-user field data for the page.
• Lighthouse in Chrome DevTools lets you test a page locally and see which resources are largest.
• The Network panel in DevTools lists every file the page loads, its size and when it loads.
• Google Search Console groups URLs with similar performance issues over time.

Test on a mobile profile. A page that feels instant on office Wi-Fi may be sluggish on a mid-range phone using mobile data in a car park in Al Quoz.

Fix images first

Images are usually the largest files on a business website, so they are often the quickest win.

1. Resize before upload. A photo displayed at 800 pixels wide does not need to be uploaded at 5,000 pixels.
2. Use modern formats. WebP and AVIF typically produce smaller files than JPEG or PNG at similar quality.
3. Serve responsive sizes. Use srcset (or a framework image component) so phones receive smaller files than desktops.
4. Lazy-load below the fold with loading="lazy" — but never lazy-load the main hero image, which should load as early as possible.
5. Set width and height on every image so the browser reserves space and the layout does not jump.

Background videos and image sliders deserve a hard look.

Audit third-party scripts

Chat widgets, heatmap tools, multiple advertising pixels, review badges, social feeds and old A/B testing scripts all add weight, and many run on every page. Open your tag manager and list every tag with its owner and purpose. Then:

• Remove anything no one can justify.
• Load non-essential scripts after the page becomes usable, or only on the pages that need them.
• Replace embedded social feeds with static images that link out.
• Use a lightweight placeholder (a "facade") for embedded YouTube videos and chat widgets, loading the full script only when someone clicks.

Keep the tracking you genuinely use — our guide to conversion tracking across forms, calls and WhatsApp explains what is worth measuring.

Slim down fonts

Every font weight is a separate file. A site using four weights in two families can easily load eight font files before text looks right.

• Limit yourself to the weights you actually use.
• Self-host fonts and preload the one used for main headings.
• Use font-display: swap so text appears immediately in a fallback font.
• For bilingual sites, subset fonts so Arabic pages load the Arabic character set and English pages load the Latin set, rather than everything everywhere.

Reduce JavaScript and CSS

Page builders and multipurpose themes often ship code for every feature, used or not. Remove unused plugins and avoid loading animation libraries for a single fade-in. Inline the small amount of CSS needed for the first screen and defer the rest where your platform allows it.

Improve caching, hosting and delivery

• Browser caching: set long cache lifetimes for static files such as images, fonts and versioned scripts.
• Page caching: serve pre-built HTML instead of rebuilding the page from the database on every visit.
• A CDN: a content delivery network serves files from locations closer to your visitors. Check that your provider has points of presence near your audience.
• Server response time: if the first byte takes a long time to arrive even on simple pages, the hosting plan, database or server code is the bottleneck, not the front end.

A sensible order of work

Priority	Fix	Effort
1	Compress and resize images, protect the hero image from lazy-loading	Low
2	Remove or defer unnecessary third-party scripts	Low to medium
3	Reduce font files and weights	Low
4	Turn on page caching and a CDN	Medium
5	Remove unused plugins, code and CSS	Medium to high
6	Upgrade hosting or rebuild problem templates	High

As a hypothetical example, a restaurant site with a full-screen video background, three advertising pixels and an Instagram feed on the homepage might fix most of its problem by replacing the video with an optimised image, deferring two pixels and swapping the feed for a linked image — before touching hosting at all.

Keep it fast

Speed degrades as people add content. Make image limits part of your publishing process, review tags whenever a campaign ends, and retest key pages monthly. A technical SEO audit is a good moment to check performance alongside crawl and indexing issues.

Key takeaways

• Measure your commercially important pages on mobile, not just the homepage.
• Images and third-party scripts are the most common culprits; fix them first.
• Fonts, caching and a CDN are the next layer of gains.
• Hosting upgrades and rebuilds come last, once the cheaper fixes are done.

If your site's platform or templates are the real constraint, our sister company WOT Innovation builds fast, modern websites. Wot Digital can then make sure the speed work supports your visibility through our SEO services.