A mysterious entity from Google is checking out our site from time to time, curious why. We have referrers from merlot-ops-labeling-devel.corp.google.com as well as 188.8.131.52/url (which will 404 without querystring). The 74.125. part of the IP seems to be a similar range to the Google shopping feed crawler, and the /url seems to be the redirector that middlemans you [briefly] when you click a Google SERP title. That IP spent a minute on the site and visited 5 pages, however the corp domain was 0:00 and immediate bounce. Looking at rdns, not sure if its actually Google, although the whois range says its theirs:
# host 184.108.40.206 220.127.116.11.in-addr.arpa domain name pointer nuq05s02-in-f4.1e100.net.
We had set up JSON-LD but it took literally 6 months for it to be re-accepted (just happened last week....finally). Not sure whether these visits have anything to do with QA/C or something.
So, out of curiousity, does anyone know what project/team/automation "merlot-ops-labeling-devel" or this exposed redirector IP/app would be? Perhaps it has something to do with said validation?