5 Largest Social Media Forums in the World

No. 5: Tumblr

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Monthly active users: 300 million

Tumblr, the forum of choice for those wishing to create graphical blogs in a matter of seconds, is one of the largest social networks around, with 300 million active users a month. Tumblr is a unique forum that allows users to easily compile libraries of photos, quotes, videos, and songs, giving them their own URL address which they can easily share with others.