Yahoo And CNET Networks have entered into a three-year partnership covering content, advertising and search marketing.

The partnership will extend the reach of both companies, as they give each other access to a huge new audience.

CNET Networks, with brands including Download.com, GameSpot, TV.com and CHOW, will provide Yahoo with technology content for Yahoo Tech and Yahoo News, including news stories, reviews and video.

CNET expects to increase its ‘brand reach’ by tens of millions of people in this way on US Yahoo sites alone.

“This announcement builds on our strategy to be the partner of choice for leading internet publishers looking to maximize their revenue potential and audience engagement,” said Todd Teresi, senior vice president of the Yahoo Publisher Channel, in a press release.

CNET advertisers will be able to target CNET users while they are on the Yahoo network, and the company can offer its marketers advertising options on the video content it provides to Yahoo.