The function "Account tagging" is necessary, if you need to help the operators distinguish the accounts from which the users came, to be able to analyze them further.
Use case:
a company needs to connect several accounts of one channel, for example, 4 WhatsApp accounts and they need to understand, which user and from which channel contacting them.
How to set up?
Step 1. In Apps tab click on "Edit" for the integration with one of the channels
Step 2. Enter in "Tags" field the value, which you would like to define for the integration