https://support.google.com/youtube/answer/16261569?hl=en&ref_topic=9153997
Manage channel insights sharing with third-party advertisers, brands, and platforms - YouTube Help
Channel insights sharing setting gives eligible YouTube Partner Program (YPP) creators an easier way to share aggregated channel insights in YouTube Studio to...
third party advertisers
https://www.aclu.org/about/privacy/third-party-advertisers
Third-party Advertisers | American Civil Liberties Union
third party advertiserscivil libertiesamericanunion