Foursquare Microblogging Social Bookmarking Tumblr 
Hootsuite
APRIL 6, 2023
This moment essentially marked the beginning of social media influencers. Tumblr and the age of the microblog (2007) In 2007, the social network described as “Twitter meets YouTube and WordPress” came a-tumblin’ along when 17-year-old David Karp launched Tumblr from his bedroom.
Techipedia: Tamar Weinberg
JANUARY 5, 2010
3 Easy Tips for Improving the Potency of Your StumbleUpon Account (Search Engine Journal): This post by Ryan Caldwell explains how you can improve your StumbleUpon account, but I’d argue that the information could be applied to other social bookmarking sites or social networks as well.
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