Forcing moves
One of the most satisfying moments in chess is when you see several moments ahead and your opponent has no idea that you already won the game or what is about to happen.
Combinations are series of forcing moves, often involving sacrifices, that can help to win the game, let's see some forced moves combinations.
This one is a little trickier, because it is only after the trade of knight that we can see the eventual checkmate.
The D file ends up wide open and white can trade Queen, ruining Black's ability to castle.
But there's an even better deflection to deflect the protection of the Black Queen by the Queen, by moving the bishop to f7, check, and forcing the King to capture the bishop, leaving the Queen defenseless.
White ends up with the Queen, and Black has no way to castle and no Queen, the game is over.