Most sites lose 40-60% of their potential conversions not because of bad copy or weak offers — but because pag

Most sites lose 40-60% of their potential conversions not because of bad copy or weak offers — but because pages load in 4+ seconds on mobile.

Here's the order that actually matters when optimizing for speed:

1. Core Web Vitals first (LCP, CLS, INP) — these are what Google measures and what users feel
2. Image optimization — WebP, lazy loading, proper srcset
3. Server response time — if TTFB is over 600ms, hosting is your bottleneck, not frontend
4. Third-party scripts — analytics, chat widgets, ad tags. Each one adds 300-800ms. Audit ruthlessly.
5. Font loading — use `font-display: swap` or preload critical fonts

The common mistake: spending hours on minification and bundling when the real killer is a 4MB hero image or a synchronous chat widget blocking render.

Fix the biggest offenders first. A 3-second improvement from image optimization beats a 0.2-second gain from code splitting every time.