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10 surprising ways companies use your private info

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Finding you the perfect job

While most professionals know the benefits LinkedIn offers as a professional networking service, few realize the site is actively trying to find you a better job as well. Beyond the data entered by users, it tracks the job postings you view and the companies you research. It also notes how quickly you're changing jobs, indicating your promotion path. Put together, the data help the site target and let you know about the "jobs you might be interested in."

"We want to digitally map the global economy, identifying the connections between people, jobs, skills, companies, and professional knowledge—and spot in real-time the trends pointing to economic opportunities," CEO Jeff Weiner said in a recent blog post.

Image source: Nicolas Hansen | E+ | Getty Images