Why Your Website Speed Is Costing You Sales (And How to Fix It)

Speed is a revenue lever. Amazon famously calculated that 100ms of latency cost them 1% in sales — and your visitors are no more patient.

Where the time actually goes

In most audits, three culprits cause 80% of slowness: oversized images, render-blocking scripts, and cheap hosting. Fix these first.

The playbook

Images: serve WebP, size them to their container, and lazy-load everything below the fold.

Scripts: defer non-critical JavaScript, self-host fonts with font-display: swap, and drop unused libraries.

Hosting: use PHP 8.3 with OPcache, enable gzip or Brotli, and put static assets behind long-lived cache headers.

Measure like you mean it

Test on real mobile hardware with PageSpeed Insights, not just your office WiFi. Aim for LCP under 2.5s, CLS under 0.1, and INP under 200ms.

Speed work usually pays for itself within a quarter — it lifts conversions, ad quality scores, and SEO rankings simultaneously.