You visit any site participating in an ad network, and a cookie can/will be set indicating you've visited that site. Subsequently visit any other site participating in the same ad network, and you'll targeted ads.
Using a cookie blocker or ad blocker (or simply clear your browser history/cookies etc.) and you'll generally see this behaviour disappear. Cheers Ken From: ozdotnet-boun...@ozdotnet.com [mailto:ozdotnet-boun...@ozdotnet.com] On Behalf Of Greg Keogh Sent: Sunday, 1 December 2013 10:06 AM To: ozDotNet Subject: [OT] Facebook advertising Hmmm! I just went into Facebook for the first time in a couple of weeks and I happened to notice an Ad at the top right for a DNS service. Now isn't that suspicious, as I just happened to mention this topic in the group last week and I've sent a few emails on the subject. Where did it get the data to make the association, from my Gmail, from forum posts, or where? I don't know why more people are scared out of their pants by things like this -- Greg K
