What were Google’s top algorithmic changes in 2011? Well I can tell you now that Google make on average 1.2 algorithmic change per day, which is almost 500 a year. So as an SEO, it’s pretty much dam-near impossible to know each and every change Google makes.
But anyway, back to my first point, what were Google’s top algorithmic changes in 2011? highervisibility.com have releasd this lovely infographic rounding up the years most significant algorithmic changes.