Most of your visitors are on a phone. If tapping the number doesn't start a call, they have to copy it and dial by hand, and some won't bother.
A phone number becomes tappable with a single piece of link code around it. That's the entire mechanism. Many sites still don't have it: in the automated homepage checks our tool ran on salon websites in 2026, roughly half had no tappable call button at all. Yours may already have one, and the free check will say so.
On a desktop screen, where sites get built and approved, a tappable number looks identical to a plain one. The gap is invisible in a desktop review, but most customers visit on a phone.
Marking up the number correctly wherever it appears, and ideally making it a visible call button near the top of the mobile page. Our $40 tune-up checks whether this is set up correctly and tells you exactly what to fix. It's standard on every site we build from scratch.