How to do Delete All Whatsapp Messages At Once?

There is no need to prove that whatsapp is too popular because you know that you and all your related are also using whatsapp, you can estimate the popularity of whatsapp yourself

And think that there are many contacts on your whatsapp There are many WhatsApp groups and they have lots of chat messages, then also think about how much time it can take to delete those whatsapp messeges one by one