Learning of Tafseer is very necessary without Tafseer As you do not know the meaning of the words and don’t understand it. As we all know that the Holy Quran was revealed on Prophet Muhammad (peace be upon him). And Holy Quran tells us the complete way to spend life which is recommended by Allah. Allah how created this universe and other things, only he is the master of the whole universe.
That’s why we should only follow the way Allah Almighty himself recommended to us. But the question is: what is the recommended way to follow, what he wants from us, how do we know? And the answer is Learn Tafseer ul Quran.