Opt-Out of Google advertising cookies....here's how

Google does allow you to opt out of advertising if you’d like.
To get started, jump to this Google Plugin page. Google provides several different versions of the Advertising Cookie Opt Out Plugin, which is initiated via web browser. Currently, the plugin is available for Mozilla Firefox, Google Chrome, and Internet Explorer. Using one of the mentioned web browsers, click the Download the advertising opt-out plugin button.

Upon doing so, the plugin should auto install for your specific web browser. For this tutorial, we will be using Firefox, so we will follow the required steps for installing any basic Firefox plugin. Click the Install Now button to install the plugin.
Once the plugin has been installed, that’s pretty much all there is to it, as very little configuration is needed. For detailed information about how the plugin operates with your web browser, check out Google’s FAQ page.
Installing the above plugin allows you to opt-out of DoubleClick cookies all together. However, you may not want to completely opt-out, but rather, setup custom preferences for Google advertising and marketing. This can be done using Google’s Ad Preferences manager.

Another option that you have, that is recommended by Google, is to configure more advanced opt out settings using the Network Advertising Initiative website also  a similar website that allows you to opt out and set preferences for many popular ad networks.