Advertisers who use Google AdWords are now able to tweak their ads for mobile devices such as the iPhone 3G, and T-Mobile’s G1. Google announced Monday it would enable AdWords would now let its users display text or image ads on mobile phones with full HTML browsers.

The company already runs an ad service specifically for mobiles, but this feature spares advertisers from creating ads in mobile formats. The ads can also point to desktop landing pages, so users needn’t create their own.

"Now, advertisers will be able to display ads exclusively on these mobile devices, create campaigns for them, and get separate performance reporting," announced Google in a post on its mobile blog. "If you prefer not to show your desktop ads on these phones, you can opt out and show ads only on desktop and laptop computers."

Targeting ads for mobile devices will be accomplished by AdWords users logging into their accounts and clicking the ‘campaign settings’ tab. Afterwards, in the ‘Device Platform’ option, the user will select the option for ‘iPhone and other mobile devices with full internet browsers.’

Despite Google’s existing mobile platform, the company has singled out the iPhone when describing the new service, mostly because of Safari, the iPhone’s mobile browser, which is considered one of the best mobile internet experiences, with its users surfing the web more than other customers.

Google CEO Eric Schmidt was interviewed earlier this year, and in that interview he called the iPhone the first mobile device with a good web browser, one in a longer line to follow. He went on to say that advertising would evolve over a few years to become more personal, and that mobile advertising would generate more revenue than normal web ads.

Of course, over the short term, the economic “situation” will slow down mobile advertising, due to it being still unproven. The overall market, however, will shoot up with the increasing number of users browsing the web from all sorts of mobile devices. Revenue is expected to grow from $1.4 billion in 2007 to $10 billion by 2013.