Mobile friendliness

Mobile friendliness means the site displays and operates well on a phone — a responsive layout, readable fonts, sufficiently large buttons, no horizontal scrolling.

Google indexes mobile-first and most visits come from mobile. A site that's unusable on a phone loses rankings and visitors regardless of how it looks on a computer.

1. 1Set the meta viewport correctly and use responsive CSS.
2. 2Ensure readable fonts (16px+) and tap targets of at least ~44–48 px.
3. 3Don't disable zoom and prevent horizontal content overflow.
4. 4Test on real phones and in the mobile usability test.