Your company profile
Knowledge Base → Company profile holds short facts: hosting providers, data regions, certifications, employee count and your security contact. Rendro cites them like a document.
"No" and "Not set" are different on purpose: "No" is an answer Rendro may give; "Not set" means it doesn't know, so questions about it are flagged for you.
Never mark a certification as held unless it is. Rendro only claims what your sources say.