Google new privacy rules, which are set to take effect Thursday, have drawn scrutiny from privacy advocates and state officials. Jens Meyer/AP hide caption

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A sign for Google is displayed behind the Google android robot, at the National Retail Federation in New York. Google is planning to roll out a new privacy policy Thursday. Mark Lennihan/AP hide caption

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YouTube's history and search history are separate tabs that users may want to use to clear their past usage, as seen in this screen grab. NPR hide caption

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A visit to the Pinterest home page reveals images of what some say are stereotypically female interests, from women's fashions to recipes. Pinterest hide caption

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Kay Clymer spends hours each day urging fellow Christians to vote. She finds their phone numbers through a database created by the company United In Purpose. Steve Brown/WOSU hide caption

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What would the world look like seen through Google's eyes? AFP/AFP/Getty Images hide caption

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