Go to Sequences → Create Sequence → Email Sequence and give the sequence a name. Complete the four setup stages:
Enrollment: Select the label and source that qualify prospects.
Followup: Choose the sending mailbox, set threading, and create templates with their delays, subjects, and messages.
Settings: Set the schedule, reply handling, click tracking, daily limits, and backup channels.
Preview: Check your trigger, schedule, and follow-ups, then run the sequence.