What does our carpet data measure, and why does it rank only idea 1?
It measures one thing: which sources ChatGPT cites about carpet cleaners. Certification is the source where carpet cleaners stand out from the other six trades, so it ranks first. We have no carpet review, site-feature or season data, so ideas 2 to 4 rank by rules, widest reach first, and idea 5 by a voluntary industry program.
The study asked ChatGPT about carpet cleaners in five cities in two ways: five ChatGPT runs per city that named no company, and 150 ChatGPT answers about named carpet cleaning companies. It's reported separately from our 50-metro study, which doesn't cover carpet cleaning. The figures are counts from one October snapshot, so they show what answers cited, not what wins a booking.
What it leaves open: a certification count tells you what answers read, not which jobs a listing books, and the rules behind ideas 2 to 5 say what you may claim, not how much work each claim brings. Of the five carpet cleaning marketing pages we read on November 1, 2026, none mentioned AI answers, certification records, germ-claim rules, guarantee rules or move-out invoices.