Whatsapp just got update and the new feature have been added. People all over the world started calling this new feature as blue tick!
Yes, it does what you were seeing in sms messages. It shows you the status of your message, whether the recipient received it or not. Sort of “delivered” status.
So, if you are using whatsapp and notice the blue ticks then it’s nothing like a bug but the new feature of whatsapp which will surely help you to know about the message delivery.
Image credits: yahoo.com