Our advice regarding such updates remains as we've covered in the past," checked out the tweet post on the main Google SearchLiaison take care of. This makes us believe that the Broad Core Algorithm upgrade on March 12 is more of a rollback of a couple of previous updates that may have offered undue positions for a couple of websites. There is a lot of chatter in the Search Engine Optimization field concerning a major change in positions of web sites throughout the 2nd week of November. Nevertheless, there is no official verification about this from Google, which means it could be a substantial Core Update that Google has verified occurs thousands of times a year.