This week the folks responsible for the search algorithms under the surface of Facebook have made a big update. They're rolling this Search Update out to desktop users throughout the week, and iPhone and iPad users will see it before the end of the week in an app update - Android has not yet been mentioned. What you need to know about this update depends on what kind of a Facebook user you are. Do I get embarrassed easily by old photos? This is the first question you must ask yourself.