Mobile isn't a secondary version of your site anymore — for most businesses, it's the primary experience most visitors actually have.
Buttons and links sized for precise mouse clicks are often too small and too close together for a finger on a touchscreen — generously sized, well-spaced tap targets reduce mis-taps and frustration.
Real mobile design restructures content for a narrow screen, rather than simply shrinking a desktop layout — the difference is usually obvious to a visitor, even if they can't articulate why one feels better.
Testing only on fast office wifi hides real-world mobile performance. Testing under realistic mobile network conditions reveals problems that desktop-only testing simply won't catch.
Appropriate input types (number pads for phone fields, email keyboards for email fields), minimal required fields, and large enough tap targets all matter disproportionately on mobile, where typing itself is more effortful.
See how your own site scores on mobile.
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