Website speed audit checklist: 15 quick wins for rankings, revenue and UX.
Website speed is no longer a “nice to have”. It is now a core ranking factor, a user experience essential, and a direct driver of conversions. A slow site doesn’t just frustrate visitors; it costs you rankings, traffic, and revenue. So, to help you take control, we’ve put together a practical 15-point Website Speed Audit Checklist below. Use it to evaluate your own site, spot performance gaps, and prioritise fixes that deliver quick wins.
Why Website Speed Matters for SEO
Search engines, especially Google, care deeply about how fast your website loads. Page speed affects:
- Search rankings – slower pages are less likely to appear at the top of the SERPs.
- User engagement – delays frustrate visitors, increasing bounce rates.
- Conversions – from online sales to form submissions, every second of delay reduces results.
Fast-loading websites win across all three fronts: rankings, user trust, and revenue.
What is PageSpeed Insights?
Google PageSpeed Insights is a free tool that analyses your website’s performance. It measures Core Web Vitals — Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID) — which Google uses as key signals for user experience.
The tool doesn’t just give you a score; it also provides actionable recommendations, such as compressing images, reducing unused JavaScript, or improving server response times.
The 15-Point Website Speed Audit Checklist
- Google’s need for speed – Is your site loading fast enough to compete in search results?
- User experience – Do your pages load smoothly, without frustrating delays?
- Bounce rates – Is laggy performance pushing visitors away too soon?
- Mobile users – Is your site optimised for on-the-go scrollers?
- Core Web Vitals – Are LCP, CLS, and FID within Google’s green zone?
- Conversions – Could slow loading be causing abandoned baskets and forms?
- Crawlability – Are bots navigating your site with ease, or stuck in traffic?
- Image optimisation – Have you compressed your images and switched to WebP?
- Server performance – Is your hosting reliable and quick to respond?
- Code efficiency – Are your CSS and JS files slimmed down and minified?
- Caching – Do repeat visitors get lightning-fast reloads?
- Third-party scripts – Are extra tools slowing you down in the background?
- Lazy loading – Are images and videos loading only when they’re needed?
- CDN usage – Is your content delivered from servers close to every user?
- Competitive edge – When stacked against your competitors, are you the fastest?
Free Tools to Test Website Speed
You don’t need to guess where your site stands — these free tools will give you data and insights:
- Google PageSpeed Insights – official Core Web Vitals report.
- GTmetrix – waterfall charts to spot load-time bottlenecks.
- WebPageTest – advanced tests for global performance.
- Pingdom Tools – simple, beginner-friendly speed checks.
- Lighthouse (Chrome DevTools) – built-in, detailed developer audits.
How to Use This Checklist
- Run your site through PageSpeed Insights for a baseline score.
- Work through each checklist item — tick off what’s optimised, flag areas that need improvement.
- Fix the quick wins first — compress images, enable caching, cut unused scripts.
- Benchmark against competitors — speed is often the deciding factor when everything else is equal.
- Re-test regularly — performance can slip over time as new content, plugins, or scripts are added.
Website Speed Audit Checklist - The Ultimate Win
Website speed isn’t just a technical metric. It’s a ranking factor, a conversion driver, and a trust builder. By working through this checklist, you’ll identify the issues slowing your site down — and unlock quick wins that can put you ahead of competitors.
Want Expert Help?
If you’d rather not dive into the details yourself, our team can run a free speed audit on your website and give you clear recommendations for improvement.
📞 Call us: 0115 671 3868
📧 Email us: sayhello@ketchup.marketing
Because in SEO, faster sites win.
Before you go - here are some common FAQs we get asked about Website Speed...
Frequently Asked Questions (FAQ) About Website Speed
1. What is a good website speed?
A good website should load within 2–3 seconds on both desktop and mobile devices. Google recommends aiming for Largest Contentful Paint (LCP) under 2.5 seconds, minimal layout shifts (CLS < 0.1), and quick interactivity (FID < 100ms). Faster sites improve user experience, engagement, and search rankings.
2. Does website speed affect SEO rankings?
Yes. Google uses page speed as a ranking factor in search results. Slow websites can rank lower, especially on mobile searches, because speed directly impacts user experience and engagement metrics like bounce rate.
3. What are Core Web Vitals?
Core Web Vitals are three key metrics Google uses to measure page experience:
- Largest Contentful Paint (LCP): How quickly the main content loads.
- Cumulative Layout Shift (CLS): Measures visual stability and layout shifts.
- First Input Delay (FID): How quickly the page responds to user interactions.
Optimising these metrics can boost rankings and user satisfaction.
4. How can I test my website speed for free?
You can use several free tools to assess your site’s performance:
- Google PageSpeed Insights – measures Core Web Vitals and gives actionable tips.
- GTmetrix – detailed breakdowns of load times and bottlenecks.
- WebPageTest – advanced testing from multiple locations.
- Pingdom Tools – quick, easy checks for beginners.
- Lighthouse (Chrome DevTools) – built-in developer tool with performance audits.
5. What are the quickest fixes to improve website speed?
Some of the easiest and most effective improvements include:
Using a Content Delivery Network (CDN) to deliver content faster globally.
Compressing and optimising images (WebP format recommended).
Enabling caching for repeat visitors.
Minimising and combining CSS and JavaScript files.
Lazy-loading images and videos.