Data about data

Metadata is defined as the data providing information about one or more aspects of the data it is used to summarize basic information about data which can make tracking and working with specific data easier.
Some examples include:

• Means of creation of the data
• Purpose of the data
• Time and date of creation
• Creator or author of the data
• Location on a computer network where the data was created
• Standards used
• File size.

https://en.wikipedia.org/wiki/Metadata