To put it bluntly, metadata is hidden data that can fuck you over. Fuck you over real hard and rough like, savvy?
Often defined as “data about data,” metadata is information about a specific file that’s often included within the file itself but that’s often not readily visible or modifiable to the end-user when z is viewing the file in the standard application that z would typically use to view the file.
In other words, metadata provides background information about a file. Chances are that every document you create, every digital photograph you take, every music file you download, and so on, all have little bits of metadata which can leak vital information about your identity.
Read the entire article at CyberGuerrilla.org