Recently Google released what they call “Panda.” This is their updated code structure to help refine searches and get what you need to know without any spammy websites. Unfortunately Google hasn’t done a very good job in the opinion of many.
For many sites that put out their own content, the ranking of the site was brought down. It’s obvious that Google is making it harder to rank content well with many websites suffering from the search engine’s fail. While most of the spam websites have been taken out a lot of the good ones have been struck hard by the code changes.
To explain all of this, the good people at Single Grain have put together an infographic to explain all of the changes.