❶ 15 of 22 links from PR6-PR8 social bookmarking sites ❷ High PR Authority sites (Social bookmark) backlinks ❸ Manual work done with browser (safe for long term site build) ❹ Popular web2.0 social bookmarking sites (digg, stumbleupon) used ❺ Exposure to targeted Traffic &audience ❻ Approved method to get index & boost Google SERP (ranking) ❼ Google Penguin update safe