From this dialog, you can decide whether or not the room should be added to your preferred rooms list, and whether or not the system should continue to learn from future reservations.

If a meeting invitation contains a room that is not already in your preferred rooms list, you are prompted to specify whether or not it should be added (see figure 10).

For example, without the preferred room filter, you have to scroll through the list of all available rooms (in a relatively small window) to see if some particular room is available.