So far, you've worked in a repository you own and you've been the only person working in it. You can only fully experience the power of a DVCS hosted repository by working with others. In this page, you work with a repository you don't own. You'll make a change to a code file, not just a README. You'll use Bitbucket's comparison features to compare your repository with the original.

The guide examples so far worked exclusively with Git repositories using git commands. In this section, you'll work with a Mercurial repository. If you start working extensively in the host DVCS community, you'll most likely find yourself working with multiple DVC systems. You may even find yourself working with other hosted products, such as GitHub or Kiln. It is good experience to see the workflow you'd use in these types of situations.