Courtroom Battle Brewing About Your Email Privacy

Computers reading emails to send advertising to you to boost profit.
1:28 | 09/06/13

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Transcript for Courtroom Battle Brewing About Your Email Privacy
news," we want to tell you about a courtroom brewing about your e-mail and privacy. Google being sued because their computers read your e-mails, so they can send you advertising. How obvious is this advertising? Abc's dan harris tried a little e-mail experiment. Reporter: To test how sophisticated google is at scanning our email, and sending us ads, I went all the way down the hallway here at abc news headquarters. And enlisted my friend and weekend gma colleague, ron claiborne. As we hatched a plan to go for chinese food tomorrow after the show, ron wrote that he needed someone to take care of his dog. And boom, dog boarding and daycare. Reporter: Then, when ron wrote that he should rent a car. Boom, discount car rentals from car rentals.Com they are on you, man. Are you the nsa leaker edward snowden by chance? It feels like it. Reporter: When I sent ron an email about bed bugs, he got ads for exterminators. When he sent me a note about needing investment advice, an ad from adviser world.Com. I figured there would be. Google says they're not the only comp doing this and they are open about their practices. They point out they don't have people reading your e-mails. Computers do that job. We knew it, but never seen it in real time. Right, amazing in realtime. Thank you dan harris and rob

This transcript has been automatically generated and may not be 100% accurate.

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