Tumblr puts up 900 posts per second and 24 billion minutes are spent on the site monthly. The site will increase Yahoo's monthly visitors by 50% to about 1 billion a month while boosting traffic by 20%. Tumblr has recently started accepting mobile ads and 25% of its visitors now come from the Tumblr mobile app.
"Tumblr is redefining creative expression online. On many levels, Tumblr and Yahoo couldn't be more different, but, at the same time, they couldn't be more complementary. Yahoo is the Internet's original media network. Tumblr is the Internet's fastest-growing media frenzy. Both companies are homes for brands - established and emerging. And, fundamentally, Tumblr and Yahoo are both all about users, design, and finding surprise and inspiration amidst the everyday."-Marissa Mayer, CEO, Yahoo
"But we're elated to have the support of Yahoo! and their team who share our dream to make the Internet the ultimate creative canvas. Tumblr gets better faster with more resources to draw from."-David Karp, Tumblr, CEO
source: Yahoo via PCMag