Scoop.it is essentially a social media curation tool. Content curation as it's known and also social as people can learn from and follow your topics that you create to scoop about. Similar to Pinterest in that way but not as popular. Scoop.it doesn't rely on images to grab your interest. It seems to me that it would be a topic you would search for on Scoop.it, so in a professional environment like a library this social media tool can be effective for clients and people in the industry itself.
Here is an interesting article on social media and libraries, I scooped it!http://lj.libraryjournal.com/2013/05/marketing/social-media-libraries-are-posting-but-is-anyone-listening/#_
And I found more librarians than libraries using Scoop.it