You can set the how many times you will be notified by this reminder by setting "Repeat every", "Unit of Time" and "Time of Day".
For Android users, you may also toggle whether a "Sound" or "Vibration" accompanies the notification. For iOS users, the only option is whether or not you want the the notification to be "Silent" or not.
If you have a value for "Repeat every" that is greater than 1, an option at the bottom will allow you to start the reminder as of the current time.