Social Media Optimization let you to reach to your intended audience by using a set of methods that make possible to generate publicity and positive word of mouth about your product or service. These Methods include adding socialize button, RSS feeds, bookmarking,tagging, blogging and incorporating third party community functionalities that enable you for networking with other people. Also you can create a viral video using service like YouTube videos and draw attention of your audience. Overall social networking let you to create viral marketing by increasing your linkability and making tagging and bookmarking easy. User generated content is very powerful tools by which people share content easily and leverage the power of the network, if you follow these tools it will greatly help you to let your content travel fast.
Here are the comprehensive lists of social bookmarking/networking sites that may interest you to take a look on them especially if you’ve planned to create the buzz. :)