If you've been interested in better Google rankings, chances are you've heard of Panda and Penguin. You're asking yourself what in the world do these two cute animals have to do with Internet Marketing and Search Engine Optimization.
Well, turns out Panda's and Penguin's have a huge impact on web marketing. Before I explain, let me lay a little foundation.
Google has always used a complex search algorithm to evaluate a web site's relevancy in respect to search terms. In the early days it was easy. Pretty much just the number of key words on a site. But that was too easy to fool, as the spammers soon learned.
Keep in mind though, Google's product is the "search result". The quality of their search result is very important. If you get nothing but spammy sites returned from a search, you'd soon stop using that search engine. So, in order to provide the highest quality results, Google has always had to manipulate their algorithm to stay ahead of the spammers. As Google got more sophisticated, so did the spammers. New, legitimate SEO companies appeared on the scene to provide "white hat" SEO techniques that were effective and legal (with Google). But soon good SEO companies figured out how to use "proper" SEO techniques to their advantage. The system became gamed.