Striped candy is one of the special candies in Candy Crush Soda Saga. They are regular candies with horizontal or vertical white stripes on them. Depending the direction of the stripes, they clear the whole row or column they are in when matched.
A striped candy is created when 4 candies (including special candies and bottles) of the same color form ether a horizontal or vertical straight line. If 4 candies are matched in a row, a vertically striped candy is created. If 4 candies are matched in a column, a horizontally striped candy is created. When formed, 120 points are given to the player.
Another way of looking at it is that the striped candy will have stripes in the direction it was moved to make the 4 in a row. Detonating a striped candy gives 60 points per candy.