What are illegal moves in checkers?

What are illegal moves in checkers? 1.26 An illegal move is condoned by the opponent moving a piece at their next turn. If any of the pieces are accidentally displaced by the players or through any cause outside their control, the pieces are replaced without penalty and the game is continued.

1.26 An illegal move is condoned by the opponent moving a piece at their next turn. If any of the pieces are accidentally displaced by the players or through any cause outside their control, the pieces are replaced without penalty and the game is continued.