More and more these days, social media websites are influencing search engine rankings. Having a story on DIGG or Reddit can mean a massive spike in traffic in the short-term. But the longer-term effects of that link are much more powerful. A link from a well-respected, or ‘authority’ site, is considered valuable. In the world of SEO and backlinks, high Google PR websites are all important.

As social media networks become more popular, and widely-used, their influence on Search Engine Rankings increases. This is one of the foundations of the Web 2.0 concept - an internet which is controlled more by the end user. If a user likes a website or story, it achieves greater exposure on a social media website. And of course this will enhance ‘organic’ search engine results. So the effects are somewhat multiplied.

A great list of Social Media Websites

http://traffikd.com/social-media-websites/

By no means comprehensive, this Social Media website list will give you a great overview of many of the more well-known social Media and Social networking sites.