Only 7.4% of Fortune 500 have an llms.txt file, study finds: ProGEO.ai research reveals just 7.4% of Fortune 500 companies have implemented llms.txt, while 92.8% use robots.txt and 53.8% use JSON-LD for AI visibility. https://ppc.land/only-7-4-of-fortune-500-have-an-llms-txt-file-study-finds/ #Fortune500 #AI #llms #robotsTxt #JSONLD