Uses:
in Pooja, Havan, Rituals, Agnihotra Pooja, etc. (usually in combination with Desi Ghee). 
Cooking by traditional method.
Cow dung ash used as utensils cleaner.
in Gau Pooja which brings prosperity in the family.
when burnt in combination with Dhoop, it cleans the environment and spreads positivity. Its smoke also helps to keep diseases away and keep one healthy.