Place a piece or the king in front of opponent’s passed pawns to prevent them from reaching their promotion square.

3r2k1/5pp1/7p/PR2PP2/2p5/2Bpb2P/6P1/3K4 w - - 0 1
Black’s passed pawns appear dangerous, but white’s firm blockade on c3 and d2, combined with an active rook on b5, allows white to hold the position.