English is a language like others such as bengali , hindi, spanish, french etc.
We all may not know all the languages of this world as there are many of them in this world.
However, we all know one language which is our mother tongue.
English is a languahe which we all should surely learn and before doing so we should know the reason of doing so.
Whenever we go to other places for different purposes, we may not require any other languahe than english.
We need it in the interviews for getting jobs and it is also required for making a good impression of ourself on others.
Teachers loves those students who knows good english.
Whenever we will go abroad ,we will need english as we may not know the local language of that place.
So as a fact there are many reasons for learning english .some of them are.just mentioned above.