Tata is a huge conglomerate with businesses that apparently have nothing to do with each other.
Steel, Salt, coffee/tea, hotel chains, multiple airlines, IT, car companies, watches, financial companies, phone companies (?), jewellery, air conditioners, the list goes on.
(Whether any of their products are good is a different matter; it may or may not be — I don't really know.)
Tata motors in India has been pretty good over the last few years. They now make very desirable products designed for the Indian market — ie., spacious, efficient, practical cars with good enough performance, reliability, high scores in GNCAP crash tests, at a price which a lot of Indians can afford.
Tata cars probably won't win any races, but they have finally figured out the pulse of the Indian market.