The Chess King can move only one square in any direction on a file ,rank and diagonal. The king does get to move though and many times can be a great piece in a chess attack. The king can move one space in any direction. It is usually smart to keep your king safe early in a game, when both sides have all their pieces moving around the board and lots of attacks are lurking. Once pieces start to leave the board and the king can no longer be immediately threatened then you will want to get the king involved.
Towards the end of a game you always want to make sure your king is brought towards the center of the board and he helps out in the attack.
Watch the video for better understanding on how to use the chess king