Social media is the hottest media to market your products now. The best examples are facebook and twitter. You can expand your list exponentially in a short period of time. It is called viral marketing.
Social media is media designed to be disseminated through social interaction, created using highly accessible and scalable publishing techniques.
Facebook not only allows you to create your personal account so that you can share anything with your friends, including your customers, you can also create a Facebook page to promote your company or your organization. For example, I have a Facebook page for our Online Business Guide, the link is http://www.facebook.com/pages/Online-Business-Guide/133647233356854, you can check it out. To create a Facebook page, you can go to http://www.facebook.com/pages/create.php
Facebook also allows you to advertise your website on its network, but you need to pay for the fees. However, you only pay when someone click on your link.
Twitter is another great media that you can promote your websites, products or services quickly to a wide audience. Learn more about twitter marketing through the following video: