Slash notation (improvising)

Slash notation could be useful for improvising parts. Sometimes you don’t want to create a full score note for note than this could be handy. Or also for drum fills this would be nice.

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Ok I see, so this slash notation would be purely visual ? No sound behind that ?

For drums I think it is purely visual, but it could also be used in more situations like chord diagrams, maybe more possibilities. I’m not very into the theory behind it.