On an otherwise empty board, a Queen on one of the four centre squares has a great deal of mobility.
The Queen in this diagram stands on d5. She can move to any of the squares coloured green.
She controls 7 squares on the d-file.
She controls 7 squares on the 5th rank.
She controls 7 square on the h1-a8 diagonal.
She controls 6 squares on the a2-g8 diagonal.

In total, she controls 27 squares.

Now let's see a Queen capturing a few pawns