Google this month announced it will roll out a new referrer URL specific to Google Images over the next few months. This is to help webmasters “to understand the role Google Images plays in driving site traffic.”
The referrer URL is part of the HTTP header, and indicates the last page the user was on and clicked to visit the destination webpage. The new referer URL is: https://images.google.com.
Webmasters using Google Analytics to track site data, the new referral URL will be automatically ingested and traffic will be attributed to Google Images appropriately. Now Google Images is integrated on Organic Search.
Google says this change will not affect Search Console. Webmasters will continue to receive an aggregate list of top search queries that drive traffic to their site.