Googles change in their algorithm to the new Penquin and Panda platforms has resulted in many websites being frozen out. It is only Googles intention to make their search engine more relevant for users, enabling them to get to the correct website faster and more direct. The ones most affected are the webmasters working to fix their sites, but the best way to recover when you have been affected is to work out why your site has been penalised.
You must make sure that first and foremost, your site’s content is relevant. Good quality content on all pages is key to getting good rankings again. The key areas to cover are :
A Stable Reliable Website
Any backlinks that you add to your website must be good quality. Googles new algorithm actually de-indexed spam type links that black hat seo companies used. Black Hat Seo companies use and aggressive way of spraying links all over the internet using automated methods. These links would be completely irrelevant to the website, hence now have become a hindrance rather than a help. SEO is a gradual procedure so stay away from companies that offer guaranteed 1st place rankings over night.