Tessa's syndicated weekly media buying column runs every Thursday on ClickZ.com. To receive her columns by e-mail, click here and subscribe to the Media Buying Track.

"The digital media buying business is a minefield of complexities. Your online sherpa, Tessa Wegert, can help you navigate the business of buying media online in her weekly column. It's straight talk from someone who develops strategy and cuts deals for clients every day."

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