Government health, research, and regulator sites climbed ChatGPT's U.S. citation ranks while explainers fell. Most free, logged-out answers skipped search.
According to Ahrefs data, PubMed moved up from 64th to fourth place among the domains ChatGPT most frequently cited in U.S. answers from March to September, while WebMD dropped from 18th to 79th.
Most of the climbers in the report’s chart were government health and research sites, regulators, and hands-on product testers. Health and finance explainers lost ground, and Britannica, Investopedia, and the New York Post fell out of the top 200. Ahrefs writes that ChatGPT “seems to be prioritizing original sources over sites that summarize them.”
The report also looked at how frequently ChatGPT searches happen. Out of 66.6 million free, logged-out responses from August and September, 14.4% involved running a web search.
Ahrefs looked at the 200 domains most frequently cited by ChatGPT in U.S. answers, based on 2.4 million answers in March and 3.8 million in September.
The company describes WebMD and Verywell Health as health sites that summarize research, and it groups Healthline and Investopedia with them as health and finance explainers. Its longer list of sites cited more adds regulators such as the CFPB and FTC, plus support pages from Google and Microsoft.
The company’s tracking system adds prompts over time, meaning that a change in rank might be due to new questions rather than a change in what ChatGPT cites. To check, they compared around 25,000 prompts that appeared among their 150,000 highest-volume prompts in both March and September.
Source link







