[Haskell-beginners] State Monad vs. fold

[martin]

Hello all,

many times I see a problem and I say to myself: "there is some state". I then play around with the state monad and often
I don't get anywhere. Then at some point I realizes, that all I need is a simple fold. I don't think I ever used the
state monad outside of toy examples.

Can someone give me some insights when the State Monad is beneficial and where a fold is the better choice.