Keeping Your Opponent Helpless
Seirawan Strategy Example #3
Winning Chess Strategies, Diagram 15, p40
The key feature of this example, according to Seirawan, is the Opposite-side Castling (Black's gone Queenside; White's taken the shorter Kingside option).
Black's Plan: Note the Half-Open File where White's King currently sits (g-file), as Black sends both Rooks onto it, creating a Battery, which apply pressure down against the weakened position in the region of White's King.
White's Plan: With Black's King on the Queenside, White strategy is to push the a-Pawn (a4-a5) and then try and get at Black's King, somehow.
White's Plan is a lot easier said than done, as Black does a good job at restricting White's options to virtually nothing ...