Explain Metadata

The best explanation for metadata is: it is data about data. For example, a library book has metadata about the book. The author, where it can be found in the library, when it was last checked out. A file can have metadata, say an image file. The metadata may include the type of file it is, .jpeg or .pdf, or the resolution of the image, or when it was taken. In a database, pieces of data may have .