Tumblr doesn't get a whole lot of attention in the social space, but there are some brands that really make it work. With all the customizable options Tumblr provides, it can be the perfect platform for a microsite or promotion - especially for brands looking to target engaged Millennial consumers. The average Millennial spends 17 minutes per visit on Tumblr, so brands that are taking advantage of the space are capturing the attention of these often elusive consumers.