Whtsapp is a boon for modern era.Without whtsapp we cant imagine the thing which is happening around the friends, culture, state, country etc.
I bought my first mobile micromax Q336 only for whtsapp because before I was using simple phones whenever I joined my first sem of engineering class all friends used to ask whtsapp no.so I decided to buy android phone.Not for only chit chat but also for stydy purpose to take suggestion from teachers regarding study.So according to me whtsapp has played a very important role in this era.