These are known as factoids. I also came to know about them recently, as I was reading them for a lot of time but never hesitated to know more about them. But once a member made a post about Factoid then I came to know that we can apply to add and remove some factoids and there are some rules to that. I am mentioning these here for you OP and other people who are not aware of the factoids so that they can get some knowledge about it. :
Re: Factoid slots. [Request] to update information, remove old ones & add new ones.The thing is, these quotations really are very informative and we should try to read them often o that we can get some more knowledge.