Why is there false information on some websites?

there is false information on some websites merely because people own the website and post false information because they truly don't know.

answer no 2:- There is false information everywhere, media, Propaganda, everywhere, the only way to determine the truth is to do the research yourself also it is not always just the owners of websites who post false information, some people hack into others sites and post untruths for their own entertainment, also some people post false information unwittingly as they believe it themselves to be true, due to a naive disposition or simply from lack of research