No service is really complete until it receives its very own iPhone app, and that's exactly what Google has (belatedly) done with AdSense. Having recently dropped the corresponding app for its own, Android mobile OS, the Big G has finally seen it as high time that iOS was given a similar offering, so now those in ownership of an iPhone, iPad and iPod touch can check their AdSense goings-on while on-the-fly.
Among other things, Google’s primary and biggest source of revenue, should you ever look at the company’s financials, turns out to be advertisement revenue. Google makes most of its income stream from the ads business that it runs, and it’s been doing that successfully for years. What’s even better is the fact that Google shares the ad revenue with its publishing partners, as well, through its AdSense program.