Google created a page on Search Central which lists the HTTP Referer values that are passed on when a user clicks to get to another website using Google Search. The page is listed as new in Google’s update log , added to document “how site owners can identify and track traffic from Google Search” within their analytics.

The same HTTP Referer values are also passed on by Discover and Google Images, the page says. That means a google.com referrer shows that Google sent someone, without showing whether they came from Search, Discover or Images.

What The Page Lists

Google Search is using the origin referrer policy, so all that appears in the header is the scheme and host of the referring page.…