When is a static route applied with a next hub, and when with an interface?

Question

Cisco

Good afternoon!
I can not understand, find a simple explanation for the following question:
When in static routing we specify the address of the next hop, and when is the output interface?
If possible on the fingers in two sentences
Thank you

Answer 1

Address - if there are A LOT of them behind the interface and you need a specific one.
Interface - if there is ONE device behind it