Pinned.
Tumblr introduced a new ad product Thursday — one that enables users to pin their posts to the top of their followers’ dashboards for 24 hours, thereby giving their content more exposure. […] Pinned Posts, is a “step up” from Highlighted Posts, Derek Gottfrid, Tumblr’s VP of product, tells Mashable. For $5, posts will hover at the top of followers’ dashboards for 24 hours. Followers can opt to un-pin those posts at any time.