social bookmarking sites
 

BlogBookMark:
Bookmarkee:
Buddymarks:
citeulike:
delicious:
Diigo:

soup.io
evernote.com
ttlink.com
pusha.se
gen-eff.net
bibsonomy.org
linkagogo.com

tumblr .com
soup .io
evernote .com
ttlink .com
pearltrees .com

Meta description means instructions and provide information that what the page is about. This can allow the search engines to understand the data. Thus you should add a unique and relevant meta description with each article.

High page rank Dofollow social bookmarking site
http://www.todayonlinetrading.com

Social bookmarking is one of the best means of creating backlinks, it helps in promotion of your business,

tumblr
soup
evernote
ttlink
pearltrees
webnews
kancyl
papaly

Check here:
Diigo Social Bookmarking,
Facebook,
Twitter,
LinkedIn,
etc.