Git is a version management tool.

Git is used to keep track of all the changes of source code.

Git can be used in any size of project from small to big.

Git provides more advantage, which makes life easier to write and manage projects.

GitHub is a cloud based hosting service, which manages the git repositories.

GitHub gives a bit extra impact than the Git, producing more advance functionality and resources, as well as a place on cloud to manage, store and collaborate on projects