The number icon located to the left of a step indicates the number of tasks that need to be completed before you can advance to the next step. In the screen shot below, the Launch & Brand step has one task to be completed.
When you open the step, for example, click on Launch & Brand, a Tasks panel listing all the incomplete tasks appears at the bottom of the page. The fields requiring a “fix” have a warning icon (). When you click Fix in the Task panel, you are taken to the appropriate task for the application you are configuring.