You can add stages that capture your community's view of the phases or steps an idea might go during its life. The stages you add will appear in a dropdown, where an admin can select the stage while editing the idea.
You add new stages through the admin console. After you add the stage, you can configure it as described in Managing Idea Stages.
Admin Console: Ideas > Idea Settings > Add Stage
The Sample Text value shows what the stage name will look like in the community.