It all started in 2011 with the mighty Google Panda update crushing almost every website hosting duplicate, thin content that added little or no value. Web pages with excessive ads and poor site structure also came under the gun.

Every webmaster, blogger and Internet marketing agency were on their toes cleaning up their acts and what followed next made things even more difficult for everyone – the even mightier Google Penguin destroyed sites that implemented black hat link building tactics that plagued the industry for years.

The standard & fruitful SEO practices of yesterday became risky business and everyone started focusing on creating high quality content instead. Here we have an interesting Infographic from the team at marketingsignals.com on the timeline and stats of these two algorithmic updates. Don’t forget to give a shout in the comment section below and share it with other SEO enthusiasts.brief history of google panda and penguin theorem