The two major things I've learned about this are that (1) you can't create a page for yourself or entities you're directly connected to (like your employer - I understand your submission could be removed if your connection is discovered) and (2) you need to be able to cite sources for your information, like news publications. E.g. If it's about a company or founder, you'll need to be able to link to news articles about them stating the facts you're including in your contribution.