Common in a MOBA.

The core loop is just push your lane, get more powerful, push your lane. If you’re doing that, you’re doing your part.

You can detour into other things, getting kills for greater rewards in terms of exp/currency, visiting other lanes to help defend/push them, etc.

And the minutae of what items and abilities to get, when, and in which order, etc, is the stuff you learn by playing, asking others, reading guides, etc.