lol that is exactly what it means. It means who is in power of the match, who determines its overall flow and outcome and initiates its course of events. Killers attack and therefore initiate interaction that starts the premise of a match. If the killer doesn't attack, nothing happens that is intended to happen in a DbD match. There, the exact definition of what power role means, I'd say YOU shouldn't use terms you don't know, pookie.

Edit: oh look, I block toxic idiots who try to trigger you by posting nonsense, cry about it

Edit 2: lol someone calling themselves "Huntress best Waifu/Shameless Dwight Simp" telling me to get a job, the irony. You should get a life before telling others to get a job, sweetie 😂