How is the core activity structured? GitHub consists of repositories that are written in specific software languages and include details such as the specific interests and goals of their creators. As a result, you can examine the profile of a repository creator and get a solid sense of his/her specific skillset. For example, let’s say you come across a GitHub user who follows and/or has created numerous Objective-C repositories—you can then deduce that he/she is likely an iOS developer.