I would say this would be useful for things you need to remember to do every week/month, or so.

Consequently it should allow you to set up an action that is added every Monday/first of the month/whatever, unless that task is already in the list.

If you, say, have a recurring task to remind you to pay off your local bobby every Saturday, but miss a payment, the action from last week should be enough to remind you this week too.