Mystery Solved: Why Mobile Safari Searchers Appear To Come “Direct” To Sites Rather Than Via Google

Since September, people using Safari in iOS 6 and searching on Google have appeared to publishers as if they’ve come directly to their sites, as opposed to having been driving by search. At last, the reason behind the Dark Google cut-off of data has been found: mobile Safari doesn’t support the “meta referrer” tag.

Source:http://searchengineland.com/mobile-safari-searchers-referrer-google-162066