If you don't use it your missing the boat. https://chrome.google.com/webstore/detail/adblock/gighmmpiobklfepjocnamgkkbiglidom?hl=en
Excellent plugin, also available for Firefox. A "related" plugin for Firefox that I've come to rely on is "DoNotTrackMe", which appears to be blocking a large amount of tracking cookies & super-cookies. On Marketwatch.com, for instance, DoNotTrackMe blocks 10 separate tracking networks (yikes!).