A photograph that doesn't contain a picture of yourself isn't a selfie. Technically speaking, a selfie has to be done while holding the camera you're using. You can use a reflective surface, but if you're not holding the camera, it isn't the technical selfie. Moving into the general structure of Instagram, which was a program that enabled users to share selfies and other pictures with one another and the most popular platform for it in its time, there's an entire separate class for images of what you're eating, varying from 'foodporn' to 'nom.' Then there are 'ootd' pics, or Outfit of the Day pictures. They're generally a class of selfie. TBT is the initialism for "Throw Back Thursday," a day when users share old photographs of themselves. Petsagram is for pet pictures.

All of these are in the form of 'hashtags,' which is a form of metadata placed on content that allows users to search across multiple users. Tagging was broadly used across multiple platforms.