With the help of this tag, you can send any information about user actions on your site to a channel in Slack. It allows adding variables like product and customer info inside notifications. This way, you'll be able to notify team members about new purchases or abandoned carts, etc quickly with this Slack tag for the Google Tag Manager server container.
     1. Send Slack Notifications Using Google Tag Manager Server Container
     2. How to set up Facebook Conversion API.