The Portable Game Notation is used to record the course of a game for others to follow or replay.
Example:
[Event "Play Chess With a WebCam"] [Site "Willich, Germany"] [Date "2019-12-21 12:46:49"] [Round "1"] [White "Wolfgang"] [Black "Maria"] [Result "1-0"] 1. e4 e5 2. Bc4 Nc6 3. Qh5 Nf6 4. Qxf7# 1-0
If you paste the above PGN into https://lichess.org/paste you'll get the following result:
See also http://lichess.bitplan.com