Your website could be leaking revenue every single day — and you might not even know it. Performance research consistently shows that for every one-second increase in page load time, conversion rates drop by around 7%. For a business doing ₦500,000 a month in online sales, that's ₦35,000 lost for every extra second visitors wait.
The metrics that actually matter
Google measures page performance using Core Web Vitals — three specific metrics that have a direct impact on both user experience and search rankings. Largest Contentful Paint (LCP) measures how fast your main content loads. First Input Delay (FID) measures how quickly the page responds to clicks. Cumulative Layout Shift (CLS) measures how much the page jumps around as it loads.
Most websites we audit fail at least one of these. The good news is that the fixes are well understood — they just require deliberate engineering decisions rather than guesswork.
The five most common performance killers
- Unoptimised images — the single biggest culprit on most sites. A full-resolution JPEG that hasn't been compressed or converted to WebP can be 10× larger than it needs to be.
- Render-blocking JavaScript — scripts that load in the page head and delay everything else from rendering. Defer non-critical JS and it can shave hundreds of milliseconds instantly.
- No caching headers — returning visitors download everything fresh on every visit. A proper cache-control strategy means repeat visits are near-instant.
- Cheap shared hosting — if your server response time (TTFB) is over 600ms, no amount of frontend optimisation will fully compensate. Move to a modern edge host.
- Too many third-party scripts — every analytics tag, chatbot, and ad pixel adds to your load time. Audit your tag manager and cut anything you're not actively using.
How to diagnose your own site
Run your URL through Google PageSpeed Insights (free, at pagespeed.web.dev). It will give you a score out of 100 for both mobile and desktop, flag every specific issue it finds, and estimate the time savings for each fix. Start with the "Opportunities" section — those are the highest-impact items.
Also run WebPageTest.org with a real Nigerian mobile connection profile. This shows you what your actual users experience, not a server in the US. The numbers are often much worse — and much more honest.
Quick wins you can do today
- Convert all images to WebP format and add width/height attributes to every img tag.
- Add loading="lazy" to all images below the fold.
- Move all non-critical script tags to the bottom of the body, or add defer/async attributes.
- Enable Gzip or Brotli compression on your server.
- Set cache-control headers for static assets (CSS, JS, images) to at least 1 year.
Done correctly, these five changes alone can improve LCP by 30–50% on most sites. If you want a full performance audit of your site, we do these as part of our web development engagements — or as a standalone audit for existing sites.