The phrase "interesting factoid" refers to a small piece of information that is interesting or surprising. It is usually a brief or trivial fact that is enjoyable to learn about. Full definition
These and many other interesting factoids about coffee are contained in the infographic below sent to me and used with permission by a reader in Ireland. (thehealthyhomeeconomist.com)
Below are just a few interesting factoids from the 550 page survey that tracks hundreds of pet ownership trends. (americanpetproducts.org)
There are a lot of other interesting factoids in there, but the part that really rang for me, which is what Andrew was drawing attention to, was this: (kaitnolan.com)