Preferred Searches allow you to save a search in order to repeat the same search at a later time. Instead of always repeating the search manually to check for new results, you can ask the system to do this automatically.
If you select the Email option in Preferred Searches, the system will automatically run your saved search(es) once a week. If there are any new items in the search, you will receive an email that alerts you to this and lists which new items matched your search terms. For example, if you save a search for books by your favorite author, you will receive an email when items by that author are added to the catalog.