What are Repository Groups and How Can I Set One Up?

When there are many users who may be working within a repository, it may be helpful to collect those users into groups. Bitbucket has some default groups, which assign certain privileges to users, and the administrators of the repository can create more, and move users who have access to the repository between different groups. This screencast explains why you might want various types of groups, and how to set up and manage them in your own Bitbucket repositories.