A lot of people had something to say about Google's Mayday algorithm update from the beginning of May. A lot of people felt that it was costing them rankings and revenue . Google's Matt Cutts talked more about Mayday at SMX Advanced a couple weeks ago. He said that it was designed to try and spot signals of quality on pages and sites that would be good for users, and that auto-generated pages and content farms tend to get hit the most by Mayday.