If you’re anything like me, running ads on your website isn’t just an option it’s a great way to make money but sometimes there are ads that I simply don’t want on my website so I need to tell Google to block them but how? Actually it’s really very simple, it’s called the Competitive Ad Filter from Google and it’s part of the AdSense tool.

To block an advertisement, you simply need to place the destination URL (where the ad is linked to) into the Competitive Ad Filter dialog box and within a few hours, Google AdSense will stop serving ads to that domain. Pretty easy right? Well there is one problem … how do you know where the ad is linking to?

Finding the desination URL of an AdSense Ad

First off, do not click your own ads. 

Wait … let me repeat that again … do not click the ads. If you click ads on your own website, you’ll earn money from the program and violate your Terms of Service. Google will figure it out (they’re pretty clever) so just don’t do it.

Instead, you’re going to have to do a little bit of detective work but it’s super easy.

1. View the source code of your webpage. To do this, right click or look under the View or Edit menus for an option
2. Search for the phrase googlesyndication.com/pagead/adclick which is how every Google ad looks.
3. After you’ve found the correct ad, look in the code and you’ll see a value titled &adurl= along with a domain name address. For example &adurl=http://www.thisismyurl.com so the domain name that you’d like to stop serving ads for is www.thisismyurl.com.

Now that you know the domain you’d like to cancel ads for, simply visit the Competitive Ad Filter  and add the link.