github?

GitHub is a web-based platform for version control and collaboration, allowing multiple people to work on projects at once. It's built on Git, the distributed version control system invented by Linus Torvalds in 2005. GitHub provides a graphical interface for managing Git repositories and includes features like issue tracking, code reviewing, and project management.

Here are some of the key features of GitHub:

1. Repositories: A GitHub repository is a space for your project where you can store code, text files, images, or any related project files. It includes all the project files and stores each file's revision history. Repositories can also have READMEs, LICENSEs, and other important information.

2. Forks: A fork is a copy of a repository. Forking a repository allows you to freely experiment with changes without affecting the original project. Most commonly, forks are used to propose changes to someone else's project.

3. Pull requests: If you have made changes in a fork and want them to be considered for inclusion in the original repository, you can create a pull request. The owners of the original repository can then review your changes and decide whether to accept them.

4. Issues: GitHub issues are a great way to keep track of tasks, enhancements, and bugs for your projects. They provide a forum for individuals to communicate about the project.

5. GitHub Actions: This is a CI/CD (Continuous Integration/Continuous Delivery) feature of GitHub that allows you to automate how your Python, Java, Node, Go, Ruby, or .NET app is built, tested, and deployed.

6. GitHub Pages: This feature allows users to host static websites directly from a repository. This is often used for project documentation or personal websites.

GitHub has become a central platform for open-source development and is used by millions of developers worldwide. As of my knowledge cutoff in September 2021, GitHub offers unlimited free public repositories, and private repositories are free for up to three collaborators. Larger teams and organizations can choose from a range of paid plans.