There are many different types of documentation that can be created to accompany research data, and their selection depends on the research context — for example, a README file.
A README is a file that helps others understand and use the shared data. It should clearly explain what is in the dataset.
The README file gives all the important information people need to understand and use the data correctly. It's a good idea to start writing it at the beginning of the research and keep it updated, so it's ready when the data is finished and shared.
It's a good idea to create a README file for each group of related files. If you have many similar files that belong together (like a set of MATLAB scripts), you can make one README for all of them. Sometimes, one file might need its own README.
Write the README in plain English as a simple text file. Try not to use special formats like MS Word. Make it easy to read by using blank lines to separate important points. Use standard terms when possible, so others can understand it easily.
Name the file "00_readme" to make it easy to find.
Guides on how to prepare a good README file:
Guide to writing “readme” style metadata