Hacktoberfest 2022 is an event that encourages participation in open source projects. It introduces Hacktoberfest, which rewards contributions to open source projects, Git which is a version control system, and GitHub which is a platform to host and review code. It then provides steps on how to install Git, create a GitHub account, and participate in Hacktoberfest by making pull requests to open source projects using Git commands like init, add, commit and push.