I believe the legal term is "Social Media Defamation".
I am not sure how this functions or whether or not you can actually sue as well as on what grounds. I have heard of people sharing lies about companies and getting away with it. So I am curious as to the process of doing this and how you know if you can actually sue or not.
I believe that this is something that can actually be done for someone who is interested in taking such matters up but I don't really think it is something that I'll be willing to do as long as I have a proof that whatever the person you have said about my business is a lie.