Why Sub-50ms API Responses Matter for Checkout Flows — and What That Really Takes

https://stateofseo.com/why-your-visual-rule-builder-keeps-producing-conflicting-promotion-logic-and-how-to-fix-it/

Which API performance and integration questions actually decide whether a checkout converts or crashes? If you build or buy payment and checkout systems, you face a handful of questions that determine revenue, fraud risk, and engineering