If you are a Google Adsense publisher, you have probably subscribed to Onsite Advertiser Sign-Up… but it can reveal the identity about your other sites and blogs!
The ‘Advertise on this site’ link you see on the Google Adsense ads directs you to a single landing page for all your websites on which you run Google Adsense ads. Google Adwords Site Targetting lets AdWords advertisers choose individual sites in the Google content network where they’d like their ads to appear. Read more about site targetting.
I picked this excellent tip at Jensense
“If you are running the on-site advertiser signup and never modified the landing page, it seems to pick up the original URL you signed up with or the personal or business name you signed up with (it could be dependent on the sign up date). And remember, the same name will appear on all sites you run AdSense on. There is a somewhat complex workaround to see the name even if the publisher has opted out of the onsite advertiser signup (and no, I am not revealing it!) so it would be a good idea to change the name on the landing page if you would like to keep the name private, even if you are opted out.”
This is very true. If you see my Onsite Advertiser landing page – it was earlier titled by me as Advertise on Quick Online Tips, and by default it was Advertise on http://pchere.blogspot.com/
But if you have multiple websites with Google Adsense ads, and you do not wish visitors clicking on either of them to know about your other sites by leading to a single onsite advertiser landing page for all of them, you need to fix the title of the page. Now I have changed it to “Advertise on This Site” which takes care of this problem from whichever site you reach here. You can also have a look at your settings and fix it if needed.