How does comments work?
Comments can be used for everything relevant to the event. Whether that is to agree on how many participants should drive to the event, or who should bring what.
Who will receive notifications?
Everyone that has the app will receive push notifications each time someone comments in the event, unless you have turned off the push notifications in the app settings or in the phone settings.
Those that answer though SMS will only receive a message if they have commented something themselves and another participant has replied to that specific message. They will then be encouraged to download the app in order to follow the conversation further.
Those that are registered with e-mail will receive an update once each day with the latest comments that have been written in the event.