❶14 of 22 links from PR6 to PR8 social bookmarking sites ❷ High PR (PageRank) Authority sites backlinks ❸ Manual work done with browser only (safe for long term site building) ❹ Popular web 2.0 social bookmark (stumbleupon, delicious, springpad, etc) used ❺ Exposure to targeted Traffic & audience ❻ Approved method to get index & Google SERP (search engine result page) ranking boosting ❼ Google Penguin update friendly & will always safe with future update as bookmarkings were meant for site sharing and submitting.
thank you
