README
Definition
A README is a file included in a folder, also called a directory, to explain how to use and understand other files in the directory. It is typically saved as a .txt file to allow it to be opened and read on any system.
A readme file provides information about a data file and is intended to help data be correctly interpreted, by yourself at a later date or by others when sharing or publishing data.
Relevant Literature
Cornell provides a guide on writing READMEs https://data.research.cornell.edu/content/readme