The numbers on the right hand side of each panel in the To-Do list are a reflection of the number of people for whom that particular action item has to take place.
So in the example below, 3 people have applied and need their forms to be screened by the organisation's administrator.
Click on the 'Screening' panel in the To-Do list on your Admin dashboard to reveal the Profile Cards for the people whose forms needs screening.
Click on an individuals' Profile Card to go direct to that person's Profile Page, where you can take a number of actions.