The way the Bishop moves on the chessboard complements the way the Rook moves: when the Rook moves horizontally and vertically, the Bishop only moves diagonally.
This is all you need to know for the moment about how the Bishop moves. Later, you will learn how to castle , how it interacts with your own pieces and how to capture the opponent’s pieces in Chess.
But for the moment, if you are learning how to play Chess, you should probably have a look at the way the Queen moves, which combines a Bishop and a Rook in one single piece.