TL;DRThe list of things the system could not settle on its own and is holding for a person.
A deposit with two plausible invoices, a shipment whose shipper did not match, a contract clause the reader could not type, a disputed invoice. Each has its own queue with the candidates ranked and the reason shown.
A good exception queue gets shorter as defaults improve; a bad one is where the whole process quietly moves.
Where it happens in Sonic
Next
See it on your contracts
A walkthrough on the agreements and files you actually bill from — not a slide deck.