Previously I was always utilizing MapMaker to find the list of categories that a Google Places/Google Plus Local page was targeting. However there is a faster way:
- Right click on the listing
- Click View Page Source
- Press CTRL + F and search for “GCID”
- The categories the page is targeting will all be listed together
*Joy’s Notes: This approach doesn’t catch custom categories which still sometimes exist in MapMaker & only works on verified listings (thanks to the comments on this article, in addition to discussion on the local Google community forum).