GitHub is a collaboration platform for coders to share, track changes, and work on projects together, similar to Google Docs for collaborative writing. It's built on the Git tool, which allows users to track revisions and collaborate with others from around the world. While it's not designed for downloading software, GitHub can be used by non-programmers when they're working on quick projects without a separate website. To use GitHub effectively, one should explore the documentation below the file list or search for an official app store listing. Additionally, Zapier offers integration with GitHub to automate workflows and connect apps, making it easier for users to collaborate and work efficiently.