The simple explanation
PunchOut lets a buyer start inside a procurement system, open your ecommerce catalog, build a cart, and send that cart back to procurement for approval.
The important flow
The buyer does not complete normal ecommerce checkout during a PunchOut session. The cart returns to procurement. After approval, the procurement system sends the purchase order. That approved PO is what should create the final commerce order.
Why suppliers need it
Some enterprise, university, healthcare and institutional buyers require procurement connectivity before they can buy from a supplier at scale. The supplier opportunity may be valuable, but the technology can become the blocker.
Where PunchOut Central fits
PunchOut Central sits between procurement and ecommerce. It manages buyer connections, sessions, cart return, approved POs, store-order creation, invoices and transaction visibility.