A variable is an element you can use to conditionally style a report or to conditionally render a report.
Each variable contains a set of values that completes the condition. A condition is a combination of a variable and its possible values. By combining custom properties with the Variable type of condition, you can define views or filters that return results keyed exclusively to the user name of the person who is running the view, to some attribute of that user (such as the user's location or organizational unit), or to the date on which the user runs the view.