Tumblr, social media microblogging site founded in 2007 by American Web developer David Karp. Tumblr is notable for its customizable interface, which allows for easy sharing of multiple forms of content, including images, text, music, and short-form blog posts, on users’ “tumbleblogs”—the site’s namesake blogs. It fostered the creation of multiple unique Internet communities, including “fandoms,” in which users bond over shared interests. Tumblr’s anonymous nature also appeals to its user base, many of whom are part of Gen Z. The company is headquartered in San Francisco. Karp founded Tumblr when he was 21 years old and working as a ...(100 of 689 words) Access the full article Help support true facts by becoming a member. Subscribe today!