Instagram is a great way to keep in touch with friends and family, but it can also be a great way to keep your messages private. To delete a message on Instagram, you first need to sign in and then click on the three lines in the top left corner of the screen. Then, select “Deleting Messages.” After you select this option, you will be able to see all of your messages that have been deleted. To delete a message, just click on it and then press the Delete key.