Online checkouts have a form problem. A card entry asks for a 16 digit number, an expiry, a 3 digit security code, a billing address, sometimes a postcode, sometimes a phone number. On a phone that is a small keyboard and a lot of thumb work, and somewhere in that flow a real share of buyers give up.
That is not your problem alone, it is a network wide one, and the networks solved it together.
What Click to Pay actually is
It is an EMVCo standard, from the same body behind the chip on your card, built on Secure Remote Commerce and supported by Visa, Mastercard, American Express and Discover on a single shared checkout. A customer who has enrolled her card once, with any of them, can pay on any enabled site with one confirmation. No 16 digit number to type, no hunting for the card, no guest checkout form.
3 things happen at once
Abandonment falls. The customer who was about to close the tab because typing a card on a phone is tedious no longer types at all. Because the checkout is tokenised by design, each transaction reaches the issuer with a network token rather than a raw card number, which lifts authorisation rates and cuts the false declines that quietly cost merchants real money.
Fraud pressure drops. Card details live on the network, not on your site, and each purchase generates a device-bound token that cannot simply be lifted and reused. It is a materially safer checkout than a guest form with card details in a browser session.
Trust goes up. The customer sees a recognisable mark endorsed by all the major networks. For a tourist buying from a Caribbean merchant she has never heard of, that signal does real work.
It is not a rebuild
Click to Pay sits on top of the infrastructure already handling your card acceptance, uses the same fraud tools, and settles through the same local bank. The button appears alongside your existing card form, so the customer who prefers to type is unaffected.
The pattern worth noticing is the direction. The networks agreed on one standard, published it, and shipped it. Merchants who add it now get the conversion gain while it is still a differentiator. Before long it will be table stakes, the way chip and contactless already are.