There was a blog post on the Inside Search Google blog a few days ago, it has a brief summary of the recent algorithm changes and it also has an excellent video discussing how they test potential changes to the algorithm (see below).
So what are these algorithm changes and what are the potential effects for SEOs?
Here are some of the more significant ones for SEOs:
Fresh Results = Good
First up is the “fresher” results update, affecting 35% of search queries. This, quite obviously, means that the more recent your content the higher it is likely to rank for some search terms – so blogs are likely to be more important now.