Links back to a business' website do not carry high value but still spread brand awareness. Enticing brands or unique sales have the chance to spark engagement on threads relevant to their business. You can even search through what people have bookmarked by typing in what you are looking for in the search tool. In fact, social bookmarking sites used as intelligent search engines. If you ever sent a link to a website to a friend, relative or colleague you used social bookmarking. Social media is a great method for social bookmarking. Twitter and Pinterest are the most popular for this.