It's a short blog post that presents an interesting, relevant bit of content along with a brief summary from the publisher introducing the content.
Most people can't endlessly churn out a great Linkbait Post day after day, so ASC recommends a strategy of publishing one linkbait per week, and then filling in with shorter but still useful utility posts the rest of the week.
Utility posts often present a video or image, or a link to a relevant website, blog, product, or report.
These shorter posts are also a great opportunity to do Trackbacks.
Link and trackback generously to other great resources in your niche - your audience will appreciate you as the “connection”, and the publishers you link to will want to return the favor.