If you've got a subscription, rent, or a paycheck that shows up like clockwork, set it up once here and Rasa Money will keep recording it for you automatically. One thing worth knowing up front: the recurring setup itself isn't a transaction and won't show up in your regular Transactions list — think of it as the instructions, not the payment. Each time it fires, it creates an actual transaction (you'll see it tagged as "Part of a recurring transaction") that behaves just like anything you'd type in by hand.
Just keep in mind that a recurring transaction can't be linked to a debt — if you're paying off a loan on a schedule, you'll want to set that up through the Debts section instead.