Castling

What is Castling?
Castling is a move that utilizes your rook and king and helps safely lock away your king from early checks and checkmates. Castling is used in most games and is a common developing technique.

How Do I Castle?
You can castle when your King and rook haven't moved and there are no other pieces in between them. The king moves two steps in the rook of choices direction, after the king has moved, the rook is placed on the other side of the king right next to it. Like shown below.