Instagram has a 'Photos of You' feature that allows you to tag people in photos. It helps you to tag people or brands in your Instagram. To use 'Photos of Your' feature, you will need to upgrade to version 3.5 of the app on your mobile phone. After you take a photo, cropped and filtered your photo, you will see "Add People" option on Share screen. Tap on a person in the photo. You will see a question on the screen i.e. 'Who's this?'. Select the person name from the drop-down menu or you can search for the person. You can then share a photo you have already taken by going to the photo.