Answer: Metadata
Explanation: Metadata is a type of 'data' which summarizes or gives information about data. It is used for referencing data which can be very helpful while working with such data as it brings ease and provides understanding of the data. Metadata data harbors specific details about data files such as documents, web pages, videos, images, spreadsheets. It contains information such as author, date created, title or meaning of headers or shortened names, file size.
In the scenario above, author's name, subject and title created in the report properties are Metadata which contains basic information about her report.