Some queries that searchers enter into engines are very frequently updated, whereas others are less frequently updated. For instance, if someone searches for “Iran nuclear talks” now, those results will change more frequently than someone looking up “Catherine the Great biography.” The Query Deserves Freshness algorithm is Google’s response to the fact that users are looking for “fresh” content. QDF relates to how “hot” or newsworthy certain types of queries are. Search engines will reorder search results so that the newest content will rank higher for the queries that deserve so-called freshness.
