Explorer is an organization tool that gives you quick access to any existing report, query, parameter, dashboard, dashboard widget, or Favorite report object for which you have access permissions. Explorers have been consolidated into one convenient tool for all report objects.
Reports and report objects, such as queries and parameters, are organized and grouped based on their function into folders (called Categories). For example, a report pertaining to a database can be stored under the Database category.
Explorer lists all categorized reports and report objects. It comes with some pre-defined, commonly used categories. You can also add custom categories based on your requirements, if you have access rights to do so.
Note: Administrators are the only users who have full Reports access by default. See Assigning Access Rights.