It isn't clear why the iPhone is tracking this data, although the possibilities for location-based features are endless - location-based advertising, geofencing apps, and so on.

iPhone为什么要跟踪这些数据尚不清楚，尽管定位功能应用充满无尽可能性——位置广告服务、地理围墙应用，诸如此类。

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In 2015, we forecast total revenues to reach $6.2 billion, equivalent to almost 35 percent of total mobile advertising revenue, and more than 60 percent of total location-based services revenue.

在 2015年，基于位置的广告收入将达到62亿美元，占整个移动广告收入的将近35%，占整个基于位置的服务收入的 60%以上。

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One interesting area for Retail Solutions is the potential to provide data for location-based advertising.

FORBES: RSI Gathers Massive Grocery-Retail Data For Brands

That is the consensus of mobile media enthusiasts who are using location-based advertising and marketing.

FORBES: Checking Out Where Consumers Check In Helps Marketers

JiWire, a leader in the space since 2003, pioneered the ad-supported Wi-Fi business model through location-based advertising.

ENGADGET: JiWire, AWG use location-based ads to spread free airport WiFi in the US