Lesson 3 of 5 · Images
Compress and size images correctly
What it is
Resize photos to the largest size they'll be shown, compress them and use modern formats like WebP or AVIF.
Why it matters
Huge images are the most common reason small business sites are slow.
✓ Good example
A 1600px-wide hero at around 150 KB.
✗ Common mistake
A 6000px, 8 MB phone photo shown at 400px.
You pass when: No image on main pages is more than a few hundred KB.
Check it now with our free Website speed test.