Every finance process has an unofficial front door: the inbox. Invoices arrive as attachments, as links, as portal notifications. Suppliers announce new bank details in passing. The amount of bookkeeping that begins as an unread email is enormous, and someone has to triage all of it.
Nance plugs into Gmail and does the triage. It finds the documents, follows the links, verifies the requests and hands clean input to the rest of your administration. The inbox keeps receiving everything; it just stops being the place where things get lost.