In the Steinitz Variation...
White moves this pawn forward
Breaking up Black’s central control
1. If Black takes this pawn with a pawn
White should move this pawn forward
Chasing the Knight
And after this move
He takes this pawn
And gains a tempo on the Knight
2. If Black takes the pawn with a Knight
White should take this pawn
And after this pawn advance
He simply brings the Bishop here
White has an outpost
An extra move
And more attacking chances