GitHub is a web-based platform that allows software developers to collaborate on projects and share code. Founded in 2008, GitHub is a subsidiary of Microsoft Corporation and is headquartered in San Francisco, California. GitHub offers a wide range of features, including version control, project management tools, and collaboration features such as pull requests and code reviews. Developers can use GitHub to host and manage their code repositories, and can also use the platform to discover and contribute to open source projects. GitHub is widely used by developers around the world, and has become an important tool for software development and collaboration. The platform has also become an important community hub for developers, and hosts a range of resources and tools to support developer education and skill-building.