If the user wants to disable the chat notification of Google in Gmail service then, they have to-
• First of all, open the Gmail app
• Now, tap on Menu appears at the top-left and Settings
• Then, choose your account
• There, you will need to turn the Chat Notifications on or off that will be under ‘Notifications’
These are the exact way through which one can disable Google chat notifications in Gmail. In case, if the users have any issues while doing it then, get connected with experts for any assistance.