GitHub is a web-based platform for version control and collaboration that uses Git, a distributed version control system. It allows multiple developers to work on the same codebase simultaneously and track changes to the code over time. Developers can create their own repositories to store and manage their code, or they can contribute to other people's projects by submitting pull requests.
GitHub also provides a variety of tools and features to help developers collaborate, including issue tracking, code review, and project management. Additionally, it also has a large and active community of developers who contribute to open-source projects and share their code with others.
GitHub is widely used by developers and organizations to host and manage their code and collaborate on software development projects. It is also a great place for developers to showcase their skills and find new job opportunities.