WhatsApp is giving users all over the world the ability to edit their messages.
It means users who make spelling mistakes or want to change their mind on how they react to a message will have up to 15 minutes after the message is sent to edit it. However, anyone else involved in the chat will be able to see that your message was marked edited but the edit history will not be shown.
All users have to do to brush up their mistakes is long-press on a sent message and choose 'Edit' from the menu. Like all personal messages on WhatsApp, edited messages will remain protected by end-to-end encryption.