Whatsapp is a great messenger tool I have used till date much better than yahoo, facebook messenger. It saves the money which is incurred on sending text messages.
I am practically addicted to whatsapp. I always unlock my cell and check my whatsapp.
However Whatsapp is very useful to communicate with anyone who is also using whatsapp. It only needs an android phone and internet connection. There is also facility to make groups and chat with many. important messages can be broadcast to many all at a time.
There are interesting and descriptive emoticons which makes chatting more exciting.Great app which helps socialisation.