How to add tags with new zendesk widget (messenger)

Hello @Huy

To add tags in Messaging, you can use this format:

zE('messenger:set', 'conversationTags', conversationTags<string[]>);

As explained in the documentation: Conversation tags aren't immediately associated with a conversation when the API is called. It'll only be applied when end users start a conversation or send a message in an existing conversation from the page it's called from.

I made a test on my end and it worked as expected:

My page template:


My ticket: 




Thank you so much. 
Does it have any setting to enable it?
I did the same like this but still did not work :( I don't know may be I missed something

There is no setting that would affect those tags, if you're able to add tags to tickets in Support this should work as demonstrated. I would highly recommend to review your setup and make sure that there is nothing that clears the tags, as for example, explained in the documentation:

"Conversation tags are cleared when the authentication API to sign-out is called."