Social bookmarking is an online service which allows you to create and publicly share website bookmarks with other members of a community by simply tagging a web page with a web-based tool so you can easily access it later. Social bookmarking websites are sites on which Internet users share their web pages, articles, blog posts, images, and videos. There are a number of advantages to submitting your content to one (or more) of these sites. For one thing, they help to increase your brand awareness. In short, it is an off page seo activity that helps in indexing your webpage with search engine.