Hi GreasyPenguin14 ,
Service tasks are tasks that are not experiments, and are used for all kinds of "service" oriented operations. These include for example maintenance tasks that clean up old experiments, experiment monitoring etc. See here for some examples, but remember, you can always write your own 😄
https://github.com/allegroai/clearml/tree/master/examples/services

Okay, but for example slack alerts do not need git access I assume?

Indeed. This is why it's provided as a reminder in the setup guide.

Remember, though, that if you use your own script there, the services agent will need to get it from somewhere, ans that somewhere is usually a private git repository 🙂