As you use it, you're supposed to submit business listings for places you go, reviews, and fixes to street names, cities, and locations to Apple. As more and more users submit this data, Apple can update the back-end data and make it more accurate.
I'm looking at the Maps app (Apple version) and do not see a link or option to submit data. How is one supposed to do that if this feature or option is lacking on iOS 6?
I know that Google has that data mining/crowd sourcing option because I've seen it on the desktop version (probably portable as well). Although, the ONLY thing I can see on Maps is the 'report a problem' link to Apple. That's it.