Checkboxes allow you to view either Median or Individual User or both. The default at startup is Median, to change, place a checkmark beside the options you want to see. The Map will re-render with the points marked based on your check box selections.
The house-shaped place-marker represents an individual user's home, the round pushpins represent median values for each zip code, and the flag-shaped ones represent the state-wide averages for all users.