Candy Corn is in its own name. Its candy! Usually eaten around Halloween, it taste like a marshmallowy chewy soft candy.
There wasn't much of an impact that candy corn had, just another candy that will cause cavities. George Renninger invented Candy Corn.
There are different colors, and sometimes different flavors. Just depending on the season. Just like Christmas would be red, green, and white, Easter would be pastel colors, and Halloween would of course be orange, yellow and white.
How Candy Corn Is Made: http://www.history.com/topics/halloween/history-of-halloween/videos/candy-corn