Heres a nice blog about folk dances in India. The point the author is making is that in India, folk music and dance has two purposes. One is the dedication to God and religion, where the dances play out episodes from the epics or from mythology, and the other is to celebrate life, and to mark the passage of seasons, with their importance to the agricultural cycle, especially the harvest season.
And do check the videos. Really nice ones!
Happy viewing, and Happy Dasahra!