A Reminder is an Alert that runs according to a Schedule. So unlike Alerts, it is not trigged by a data (or other change) but according to a date schedule set by you.
The Schedule can be either a one-off date, or it can be a Recurring event (e.g. every Monday at 8am, or every day at 17:00).
Use the wizard and follow the steps.
Your Reminder will include 2 elements:
Alert - a Message, Header, Message Type and whether to show as Popup
Schedule - determines when the Reminder is shown to the user.
The Adaptable Blotter publishes an event each time an alert is fired and this will include reminders - see Messages and Alerts for more details.
You can edit, delete and share Reminders as you can with all Adaptable Blotter Objects.