Rotation
Rotation is the movement in the direction of the deal, which is clockwise. The button, the action and the deal all rotate around the table.
The simple explanation
In poker, the button moves clockwise after each hand. The betting also goes clockwise. This movement is the rotation.
A closer look
The rotation decides who posts the blinds and who acts next. Some games rotate the dealer in different ways, such as in home games where each player deals in turn. In mixed games, the game also rotates after a set number of hands.
A practical example
After each hand, the button moves one seat to the left, following the rotation.
Full explanation
Rotation is the movement in the direction of the deal, which is clockwise. The button, the action and the deal all rotate around the table.
Rotation is movement clockwise around the table.
The button and action follow it.
It decides who posts the blinds.
Mixed games also rotate the game.