Other common information that is recorded are the timestamp (date and time), image resolution, file name and file size among others. It can also be user definable to include such information as geographic location of an image, temperature, name of the photographer and even the exact coordinates for a GPS location.Tagging an MP3 is simply adding additional information to it, such as Tag MP3 Editor, the episode title, host names, and more. Back in the day, tagging was really important because most people listened to podcasts on their computer or iPod.