Sequences are a way to send multiple reminders for a single appointment. For example, if you want to send a confirmation email when a booking is made then a reminder 7 days before the appointment then a reminder on the day of the appointment then sequences allow you do this.
Note: 1 Sequence can contain as many “steps” as needed. You don’t create a sequence for each time you want a reminder to send.
Please watch this video on how to set up sequences. Sequences can be found under Scripts > Sequences.