Invalid clicks costs marketers millions in lost revenue and opportunity every year. If you're running AdSense campaigns it's imperative to plug this potential drain of your marketing resources ASAP.

Google considers invalid click activity as any clicks or impressions that artificially inflates an advertiser's costs,  or a publisher's earnings.  Despite Google's Ad Traffic Quality team monitoring traffic across its ad network in an effort to prevent advertisers from paying for invalid traffic, click fraud remains rampant.

And because 97 percent of Google"s $33 billion in revenue last year came from advertising, they consider protecting against this type of fraud paramount. The company recently launched an in-depth Ad Traffic Quality Resource Center designed for both advertisers and publishers so there is no excuse not to be paying attention.

Five things your team should know