What is Metadata? It is data that provides information about other data. It summarizes basic information about data, making finding & working with particular instances of data easier.
Where is it? It can be internal, within the contents of the file. Or, it can be external, residing in a database, catalogue, library or an index associated with the file.
How is it created? It some instances, it can be created manually, but most metadata is created automatically by the applications used to create the file.
What is it good for? Now here is where it gets interesting….