Deferred Revenue
Also called: unearned revenue, contract liability, deferred income
Deferred revenue is cash collected before the service is delivered, recorded as a liability until it's earned. Annual software subscriptions are the classic case. It's the rare liability investors like, because it represents customers who have already paid: growing deferred revenue signals genuine forward demand and funds operations without borrowing.
Where this is taught
Definitions are the trailer. These free levels turn Deferred Revenue into something you play — one bite-size lesson, with worked examples, a quiz and XP.