GitHub is an online platform (https://github.com) to manage source code. It offers the distributed version control and source code management of git, as well as a number of features that greatly facilite source code collaboration, especially for open source projects. It has become the largest host of source code in the world and supports projects ranging from traditional software management to scientific research and open data. In 2014 TDWG adopted Github to host, version and collaborate around its biodiversity information standards (https://github.com/tdwg) and is increasingly using it for executive and interest group activities. In this talk I will explain 1) how to contribute to TDWG standards and activities using GitHub, covering features such as version control, editing documents, and submitting pull requests and issues, as well as 2) how to manage a GitHub repository, including features such as the wiki, issue management, inviting collaborators and creating releases. It should provide you with enough knowledge to feel comfortable diving into GitHub, be it for TDWG or otherwise.