Run for the hills, Yahoo! (NASDAQ:YHOO). Women and AOLers first, Time Warner (NYSE:TWX).

Google (NASDAQ:GOOG) is finally giving display advertising more than just a halfhearted try. That's bad news for Yahoo!, AOL, and any company that was carving out a cozy living serving up graphical online advertisements.

Google may have telegraphed its display dreams when it snapped up DoubleClick in a $3.1 billion deal, but now it's going all in. Big Goo just launched the DoubleClick Ad Exchange and incorporated DoubleClick into its lucrative AdWords platform.

Paid search has been Google's wealth builder, as hundreds of thousands of advertisers crank out brief text ads and bid on relevant keywords for exposure. Google is now making it easier for those same sponsors to reach the masses with graphical ads, too.

Advertisers want leads, and smaller sponsors may lack the graphic design skills to build out appealing display ads. Here is where Google's recently launched Display Ad Builder comes in, allowing AdWords customers to quickly customize gallery templates and begin advertising throughout Google's homegrown sites and third-party partners.

From Google's own YouTube to News Corp.'s (NYSE:NWS) MySpace, the goal here is to create the same vibrant paid-search ecosystem with display advertising that AdWords created for text ads. This initiative will go a long way toward monetizing YouTube, filling empty pages elsewhere, and giving smaller display players such as ValueClick (NASDAQ:VCLK) fits when they compete for third-party publishers to syndicate their ads.

This move was inevitable -- and it's hard to imagine Google not being the dominant player in this space in a couple of years.

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Longtime Fool contributor Rick Munarriz wonders whether you can sell keyword ads when soul-searching. He does not own shares in any of the stocks in this story. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.