Google lists some of the cookies it uses here:
https://business.safety.google/adscookies/

The 1P_JAR is listed as an advertising cookie whereas the AEC one is not listed there.

In reply to Re: Why does HTTP::Cookies and/or LWP add Google cookies to my cookie jar when visiting another site? by Bod
in thread Why does HTTP::Cookies and/or LWP add Google cookies to my cookie jar when visiting another site? by Polyglot

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