How to edit WhatsApp messages on Android and iOS

Long press on a message that has already been sent, which needs to be edited
On the drop-down menu that opens, select or tap on ‘edit’
This will open a floating text editor in front of you, where you can rectify a message that you have sent already
 An ‘edited’ tag will appear below your message, confirming that your changes have been saved
However, the editing capability on WhatsApp is time-limited. Users can edit their messages in personal and group chats for a 15-minute duration.