How does Zendesk Chat handle chats coming from different brand Help Centers?
Zendesk automatically tags visitors who view the Chat widget on a branded Help Center, to assist in routing chats and Chat tickets. The brand name value is used as the tag, and looks like this:
The tag is synced to the ticket in Support with the rest of the tags at the end of the chat.
For more information, see the article: Multibranding Zendesk Chat (Enterprise).