As more of us have access to the Internet and apps on our cellphones and tablets, advertisers are looking for new ways to reach us there. Some mobile ads remain just miniature versions of ads on websites, an echo of the early days of the Internet, when advertisers essentially slapped print ads online. But increasingly, advertisers are tailoring ads to phones by taking advantage of elements such as their ability to track location, make a call, show maps with directions and add calendar alerts.
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