GitHub is a platform for collaborative software development, built around Git version control. It enables developers to store and manage code, track changes, and collaborate through pull requests, reviews, and branching workflows. Beyond source hosting, GitHub offers an extensive ecosystem of developer tools: automated CI/CD pipelines through GitHub Actions, built-in vulnerability scanning and dependency insights, issue tracking and project planning tools, package registries, and advanced security features like secret detection and code scanning.

Its open-source community is one of the largest globally, connecting millions of developers who contribute to public repositories, share knowledge, and build reusable tools. GitHub also supports enterprise-grade collaboration with fine-grained permissions, compliance features, and private repository hosting. By integrating code, automation, security, and collaboration into a single platform, GitHub has become an essential part of modern software development workflows.