Open data is data that anyone can access, use and share. Governments, businesses and individuals can use open data to bring about social, economic and environmental benefits. Open data must be licensed. Its licence must permit people to use the data in any way they want, including transforming, combining and sharing it with others, even commercially.

Source: Wikipedia contributors. (2022, July 15). Open data. Wikipedia, The Free Encyclopedia.
Online: https://en.wikipedia.org/wiki/Open_data 

Source: Open Data Handbook. Guide. What is Open Data?
Online: http://opendatahandbook.org/guide/en/what-is-open-data/