Notes on notability
Field notes on what earns a place in the encyclopedia, and what does not.
Due weight and the criticism section
Wikipedia's neutral-point-of-view policy measures how much space a fact or a controversy deserves against how much reliable, independent coverage it actually received — not against how flattering or how uncomfortable it is for the subject.
The sentence no source wrote
Wikipedia's ban on original research has a specific failure mode called WP:SYNTH: combining two accurate, individually sourced statements to imply a third claim that neither source makes. It passes more drafts through review than outright fabrication does, because every sentence in the paragraph checks out on its own.
Match the title to the coverage
Wikipedia titles an article by the name reliable sources use most often, under a guideline called WP:COMMONNAME. A company's own rebrand announcement carries no weight in that discussion until the trade press and wire services start repeating it, which makes timing, more than argument, the real skill in filing a requested move.
Blacklisted domains outlive the accounts that caused them
Wikipedia's spam blacklist filters by URL, not by account — a domain flagged for one promotional link becomes unusable on every article, by every editor, including the ones who had nothing to do with the original spam. Getting a single page whitelisted afterward can take longer than the campaign that caused the listing in the first place.