According to Google, there is going to be a new “source” line item for the image search reflected in Google Analytics will displays as “google images” in the Source report and “google images/organic” in the Source/Medium report found within Analytics.
The following screenshot shows how it will look:
According to Google, the images.google.com line with continue to show in the Referral report, just like before. Once the change happens though, the “google/organic” line under Source/Medium will not include Google Image search traffic. Instead, that will be segmented into just the “google images/organic” line.
Google said that some users may notice a drop in traffic, “perceived to be coming from ‘google,’ since it will be reclassified as coming from ‘google images.’” But Google added, “[I]n some cases, you may see an increase in organic traffic as we reclassify some traffic previously classified as ‘referral’ to ‘organic.’ These changes should all balance out, and you shouldn’t expect an overall drop or increase in total traffic.”
If special filters are set up, you might have to reclassify those filters when this change rolls out.Google said, “[Y]ou will want to make updates as needed to capture the new Source parameter in your custom settings.”