Yes. For most local businesses, more than half of visitors will be on a phone, and a site that's awkward on mobile loses them before they've read a word.
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For most small, local businesses, the majority of visits come from mobile devices. Someone searching for a plumber, cafe, or salon while out and about is searching from their phone, not sitting at a desktop.
Text that's readable without pinching to zoom. Buttons and links large enough to tap accurately. A phone number that's tap-to-call rather than just displayed as text. And pages that load quickly on a mobile connection, not just a fast office wifi.
Tiny text that was fine on a laptop screen, a contact form with fields too small to tap accurately, a menu or navigation that doesn't collapse properly and covers half the screen, and pop-ups or banners that are awkward to close on a small display.
Search engines evaluate the mobile version of a page as the primary version when deciding how to rank it. A site that works badly on mobile can rank worse even for people searching from a desktop.
Most modern templates are responsive by default, but it's still worth checking on an actual phone rather than assuming, since some custom tweaks can accidentally break that.
The simplest way is to open it on your own phone and try to do what a customer would: find your number, read the hours, tap a button, rather than only checking it looks fine in a desktop browser's mobile preview.
A free preview, built mobile-friendly from the start.
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