What is targeting?

Can someone explain this to me? Anyone have an uncle who refs or something? Looking at the last play for Michigan and the hit on Harrison Jr I thought both were clearly targeting. Am I salty? Maybe a little but am I drunk? Maybe a lot. But I know targeting when I see it whether the screen is blurry or not.

EDIT: I don’t know targeting when I see it. Rewatched the MHJ hit and it was shoulder to shoulder. GG dawgs and frawgs.