To edit the information in a Bar (or Container), just click on it. You can add details that will be visible to viewers of your roadmap. Editors of your roadmap can also update Bar information.
You can also have a Custom Field on the details page, which is set by the Admin of your account to help you standardize your roadmap even further.
As you complete details, they are visible to viewers of your roadmap (items you don’t complete are hidden).