In Outplay, a prospect's stages reflect where they are in your outreach process, so you can filter and find prospects as you need.
As a prospect moves through sequences, your Triggers can automatically set the appropriate stage. But sometimes you want to manually set a prospect's stage. You can do this in the prospect's profile screen.
Double-click on the prospect for whom you want to change the stage
Hover the mouse over the current stage
Select the stage you want to mark for the prospect from the dropdown.