ChatGPT carries citation authority across categories, but brand mentions stay in‑topic
SEMrush’s analysis of 1,094 US categories shows that when a site earns citations in one niche, ChatGPT will often cite it in adjacent categories, but its brand name only appears in prompts close to the brand’s core expertise. Finance and real‑estate saw the widest spill‑over, while legal and healthcare kept authority tightly bounded.