There are many correct answers to this question because there are many purposes to Google Messaging. One is a way for agents to share 300! Or higher. These agents sharing this helps motivate the team, as well as bring competition, which leads to better numbers across the board.
Another purpose of Google Messaging is to be used as a means for training because it can give insight into common and uncommon situations pertaining to customer service. Along with training purposes, Google Messaging helps agents keep track of their calls, as well as provide insight on how productive their day as been.