The information you provide will be specifically listed in the a buyers listings. Your privacy is protected, only the generic information about your housing specifications will be advertised.  The possible advantage to you is obvious.  That you might be appraised of a home that matches your specifications on or before the date of listing.  You could be in the envious situation of obtaining the earliest possible personalized showing of the new listing.  Providing relevant, timely information to both the buyer and seller creates a win-win situation for both parties.  The buyer- a home that meets their unique needs.  The seller- exposure of their listings to buyers who are likely to be specifically interested in their home.