The Advanced Chat service lets you use the Google Chat API in Apps Script. This API allows scripts to find, create, and modify Chat spaces, add or remove members to spaces, and read or post messages with text, cards, attachments, and reactions.
There have been a number of updates to the Google Chat API summarised in the linked release notes page. A recent announcement which might interest Google Apps Script developers is the generally available of a new Advanced Chat Service. As noted in the official documentation:
The Advanced Chat service lets you use the Google Chat API in Apps Script. This API allows scripts to find, create, and modify Chat spaces, add or remove members to spaces, and read or post messages with text, cards, attachments, and reactions.
There are some perquisites to use the Advanced Chat service besides the usual turning it on before use, the main one being the requirement to use a standard Google Cloud console project rather than the default project created automatically.
