the update is still concentrating on the development of Penguin. It was more effective right now in eliminating the spammers.
To avoid spamming Google has introduced such a updates to keep safe result & relevant for their users.
Google has launched its latest "diversity" update .This update is being launched on 14 September by google.This is harmful for those sites which are using so many key words to optimize for just of one page. Google wants that there should be different results on the first page of the google search when anyone search about any query. You can search more about this update in google search.
Despite the fact HTML5's improved markup language should boost SEO functionality, Google are currently waiting to see how people use it
[SIZE=-1]Over the past two years, Google has rolled out two major updates to SEO rankings, called Panda and Penguin. Panda was first implemented in early 2011.[/SIZE]