Buy Buttons "are the ability to do one click payments" starting at one location/app but typically fulfilled/completed behind the scenes at a different location.
We've blogged about what's driving their rising popularity in the past. Here's a good article on ReadWrite about buy buttons and Pinterest with some comments from Spreedly.
A conversation with Juan Ortega, co-founder of Rappi, about payments in Latin America and how they maximize payments success rates.
Implement once with Spreedly to simplify support for 3DS2 across top gateways in the EU and beyond. Meet compliance obligations and reduce eCommerce fraud.