What's App is all set to resolve the bigg problem for sent messages

WhatsApp is a very popular Messaging App with 1.2 Billion monthly active users.
WhatsApp added a new feature to beta "Unsend Feature" with the name of
"Delete for every one".
With this new feature you will be able to edit or delete your text messages, gifs, docs etc with in the time period of five 5 minutes.
However if message is already seen or read it can not be edited or deleted by the feature.