What is the best term for "data about the data"?

The term "metadata" refers to data that provides information about other data. This can include details such as the type of data, how it was created, when it was created, and any other descriptive attributes that help users understand the context and structure of the primary data.

For example, in a digital photo file, the metadata might include the date and time the photo was taken, camera settings, and even the location where the photo was captured. This additional layer of information enhances the usability and management of data by making it easier to search for, sort, and interpret.

The other options do not accurately describe this concept. "Megadata" suggests a quantity of data but does not imply it is about other data. "Superdata" is not a recognized term within data management or computer science fields, and "predata" could be interpreted in various ways but does not have an established meaning related to data about data.