Just a few years ago SEO and social media simply coexisted. But over the last few years the line between the two began to blur. Now more than ever the major search engines use social signals as part of their ranking algorithms. In web marketing today an effective SEO strategy will be incomplete without incorporating into it the social aspect of the Web 2.0 which is built around the social element to begin with. And on the other hand, an effective social media strategy will be contributory to the SEO initiative. It is important for the two to work together in order to achieve higher rankings in the SERPs, increase site traffic and of course increase the ROI for a business. Over the last few years there have been several giants in the world of social media; but recently there have been some changing of the guard. Here three top social media platforms that should be part of any social media strategy used in an SEO campaign.