What Does Do Not Track on iPhone mean?

I came across a feature called Do Not Track on my iPhone 4S. What does it mean and do?

It means that your location and other such details etc. Will not be tracked. See, if you select "do not track", then you, you location and your iPhone usage habits will not be tracked. This is for advertisers, third party apps etc. And Apple also indicated that even NSA (National Security Agency) is not supposed to track you either.

DO Not Track means don't follow me around. Mac wants to know everywhere you are at any given time

Dunno