An expert roundup is a collection of quotes or interviews by influential people in your niche. Each participant should be someone with some authority in your field and that has something to contribute to your readers.
The most effective roundups pose a very specific question that the experts can easily respond to. It should be a question that people care about the answer to.Here are a few great example roundups....
HubSpot shares a step-by-step process for putting together an effective expert roundup post that drives traffic and social engagement.