The messages module can be used for sending an important information from Backstage and to be received from the participants in their apps.
From List messages, you can review all messages that were created in Backstage and were sent or going to be sent to participants' apps.
From Create messages you can draft your message before sending it out. You can select a proper subject and a relevant message body to it. The text in the message body can be formatted in Markdown or HTML style. Also, you are able to add a sender name and a sender image so you can identify yourself. Furthermore, in order the message to be delivered on time you can fill out "Send at" field and if you would like to disappear after some time you should fill "Expire at".
Please note that all times in Backstage are in the event’s time zone and leaving the two fields empty will deliver the message immediately without hiding it from the App in the future. You can also add a specific document from Backstage. Moreover, you can target the message in order to limit the group of people who can see it.