Meta-tasks around projects. Communicating/coordinating with other people. In big-corp land, mandatory training and time spent on time tracking (a bit ironic). Dealing with git screw-ups by people new to it.
I think the problem is when such administrative work interrupts the intellectually productive work.
I think another key component of administrative work is that even if it's time sensitive, it's not urgent.
> Dealing with git screw-ups by people new to it.
I do this all the time. Of course, the person new to it is usually myself.