Mobile sends most of the traffic to almost every small business site now. It still converts at roughly half the rate desktop does. Benchmark data across sectors puts the overall gap somewhere between 40 and 60 percent, worse in some categories, better in a few. That is not a smaller audience buying less. It is the same visitor, on a worse interface, closing the tab before they finish.
Look at the spread by industry and the lazy explanation falls apart fast. Healthcare and education sites see something closer to a 40 percent gap. B2B software and real estate run closer to half. Ecommerce and travel sit in between. If mobile shoppers were simply less serious buyers across the board, every sector would land on roughly the same number. They do not. That points at the page, not the person holding the phone.
Most of the reason sits in how the page was built. A thumb has a comfortable reach on a phone screen, and a call to action sized for a mouse cursor often sits outside it, right at the moment someone would act. Checkout forms built for a keyboard and a wide screen force a phone user to tap into small fields, fight autocorrect, and switch keyboards mid form. Research into mobile checkouts has found that most mobile shoppers have abandoned a purchase at least once for exactly this kind of friction. Nothing to do with price. Nothing to do with the product.
Two details show up again and again in that research. Shoppers abandon when a site forces an account before checkout. They abandon when they cannot see the full cost, shipping included, before they commit. Add a form that clears a filled in card number after one typo, and a visitor on a phone now has three separate reasons to leave before they have paid for anything. None of that is a mobile limitation. It is a form designed once, for a desktop screen, and never redesigned for a thumb.
Responsive design gets credit for fixing the wrong problem. It resizes a layout so it displays on a smaller screen, which is genuinely useful. But display and interaction are not the same job. A button that resizes correctly can still sit in the wrong place for a thumb. A form that reflows into a single column can still ask for too many fields in the wrong order. Making a desktop page fit a phone screen is not the same decision as designing a page for a phone in the first place.
Closing the gap means making those calls at the design stage, not patching them in after someone spots the number in analytics. Where does the thumb actually land when a phone is held one handed? How many fields does a form really need before it asks for one too many? Does the total cost show before the card details do? Those are decisions a studio makes while a page is being built, and they are worth raising before the next redesign ships, not after another quarter of watching the mobile number sit at half the desktop one.
The honest takeaway is not that mobile visitors want less. It is that most sites still hand them a desktop experience with the edges trimmed off. Fix the interface, and the two numbers start closing in on each other.