It is very high in saturated fat, being basically butter (clarified as per Flatus' instructions above).
It's good in India as it keeps rather better than ordinary butter in hot weather.
The other advantage is that you can heat it to very high temperatures before it burns (much higher than cooking oil for instance).
(and it tastes good)
If you want to be authentic use it.
If you want to have lots of Indian style food, you may wish save ghee for special occasions.
S