The Ultimate Glossary: 101 Social Media Marketing Terms Explained
Hubspot
JUNE 23, 2010
As of June 2010, LinkedIn had more than 70 million registered users, spanning more than 200 countries and territories worldwide Lurker - A lurker online is a person who reads discussions on a message board, newsgroup, social network, or other interactive system, but rarely or never participates in the discussion.
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