There should be two tabs: history and google analytics, according to https://security.stackexchange.com/help/privileges/site-analytics
Instead, I see history and traffic sources. The page title of traffic sources is (still?) google analytics. I assume the help text is outdated?
As an aside, it's also a bit of an anti-climax, thinking you get access to google analytics-level details of stats (I was already wondering about the privacy implications, but postponed judgement until I got to see what exactly was shared) and found only stats like "10% comes from duckduckgo and 8% from the law stackexchange site". I get the reason for it, but this does not even approximate GA, even if the source of the two datapoints you extract is GA.