Every single invitation will give you the option of turning off notifications for comments. There could be several reasons as to why you would like to turn this off, for example you may find that the comment field is used too much or if the content is of no interest to you.
You can turn off the notifications if you enter the event or group in the app. Choose the “More” tab to the top right corner, and then “Stop push notifications”. You will no longer receive comments (alerts) from this particular event if you choose this option, but you can always change your mind. This process is done in the same way.
PS! You will still receive a push notification if the event is changed or cancelled by the administrator.