adssettings.google.com/authenticated?hl=en
This page will let you know a lot of the things that Google knows about you which can include your age range, clothes you wear, stores you shop at, approximately how many people work at your job, interests and hobbies, wealth level, education status, etc.
Nothing secret but something to see
Well it already has my age wrong so
yeah this is just information you've already given them when you made account not like passwords and ip and stuff
they do have all that's stuff too though