Why Queen is the most powerful piece in Chess?

Queen is the most powerful piece in chess. It can move in any direction.

Initially that wasn't the actual case. Queen was one of the weakest piece in the game.

In 15th Century when they played chess in the Royal Court of Spain, Queen Isabella was offended by it.

 She asked her advisers if they thought her that feeble. Their response was to make her the most powerful piece in the game.

In chess, the more powerful a piece is, the more useful they are not just for winning but to be used for sacrifice as a trick.

A queen sacrifice in chess is the deliberate sacrifice of a queen in order to gain a more favorable tactical position.