Tumblr is a hugely popular and highly social blogging platform with an emphasis on images. Many Tumblr sites are dedicated to gathering and sharing images on a particular theme. Lots of individuals use it for social networking, and it is also common for groups and businesses to use it as part of their online identity and for social marketing outreach. With a little bit of extra know-how, Tumblr can be a powerful tool for collaborative website building.
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