uskalddu cyaachang
uskalddu cyaachang voted up Bradley Cooper's answer

The concept of Social Bookmarking is to get your site indexed faster and to "insure" yourself that your content will be indexed first by the Search Engine because if someone else "steals" it and get's it indexed before yours does your site might get penalized for duplicate content.

Also, social signals (i.e comments, shares, likes, … Read more