Some general rules that apply for most if not all modules:
you can trigger them via trigger
the modules effect stop when it is deleted
in most cases where a module expects a single synced object, you can also sync multiple in which case it randomly selects between all options or applies the effect to all
when syncing groups of units it does not matter if you sync the leader, the group, or each unit from a group or anything in between. It is smart enough to figure it out and adds the whole group and avoids adding units twice
most modules effects follow the module if you move it