Communication

List he had only lists general categories. However, the word "ROOMCHAT" in all caps in the title could imply a certain categorization of the chat, possibly linking to a category involving communication or 'Actual usage' of a platform that includes chat functionality.

Applying object- a cyber communication app user can be classified under a platform category title but best categorization turns ou for this could be Engineering

Judging by the title "Telegram", I would categorize it as: Communication

Communication is the category that the Telegram social media entity belongs to, though it is not on the list. The closest relevant category would be the "Entertainment & Media".

Web & Communication

official telegram communication channel for $GAGA - The Color of Money (GAGA.pe)

Communication

Communication Applications