Does it seem to you as if Google spies on where you’ve been on the web, showing you Google ads (you know, those “Ads by Google”) that are based on where you’ve just been, instead of where you are now? Are you starting to feel as if Google is evil, despite their “do no evil” mantra, using some sort of special Google spyware to show you Google advertising based on your travels across the Internet? Do you feel as if Google is following you around the web? Well, you’re not far off. Google is following you around, in the form of a cookie that they have trailing you. A cookie that tells Google where you’ve been, and Google then chooses which Google ads to show you based on that information. Most commonly, you will see ads advertising something in which you showed an interest previously, on another site, in an effort to rekindle your interest and induce you to buy. This is known as “retargeting”. You can opt out of this Google privacy invasion, which Google calls “interest-based advertising”, but you have to know how.