What does Bump mean?

A "bump" is a term used in online sneaker communities, particularly on platforms like Facebook, to repost a sales post for a sneaker in order to bring it to the top of the page. This is often done by the seller or by third parties who comment on the post with a "B" to signal that they want to bump the post back to the top. This is done in order to increase visibility and potential interest in the sale of the sneaker.