A tactical move...
... to win a piece
On material count both players have 18 points. Black's two rooks and bishop are a good match for White's queen and rook.
However, on this move White can gain a significant advantage as there is a weakness in Black's position.
Can you see the winning move ?
I set up the position on the Chess.com board and played against the computer (Level 8)
It took me 33 moves to checkmate Black's king. You might see a quicker way to finish the game.
Play the game (annotated to show my thinking)