I found this great infographic that outlines all the Google Algorithm changes that happened in 2011 and I added some more links for you, enjoy!
The January and February updates prevent the JCPenny SEO issue and the Forbes Link Issue from happening in the future.
The infographic mentions that Matt Cutts (Head of Google Spam Team) announced 10 changes to the algorithm, here is the link to read all 10.
Top Google Algorithm Changes of 2011 by HigherVisibility
Filed under: Personal Branding

