If you have updated your iPhone or iPad to iOS 6 there is action you should take to protect your privacy and our security. Apple quietly introduced a tracking feature in iOS 6 which tracks user activity such as browsing, search history, location, application, and purchase information which it then sells to advertisers.
We would highly recommend that you take a moment to check the version of your iPad or iPhone device and take the following remediation steps to turn this tracking off:
Go to Settings->General->About and if the Version is 6.0 or higher you should continue to scroll down until you see Advertising. Select that and then turn “Limit Ad Tracking” to ON. By enabling this feature you will prevent Apple from tracking you and selling this information to third parties. If the version is lower than 6.0 you needn’t take any action.