Every program has four “waiting rooms” for potential clients. Each “waiting room” will open the doors to the program on a date you set – meaning you can launch the same program for up to four groups simultaneously.
The waiting rooms are named “Program Group 1”, “Program Group 2”, etc.
This enables a traditional online program launch model, where you sell to everyone for a bit and then they all start at the same time.
If you are only doing one group for a launch, then I would pick Group 1 for that program as your waiting room. The date you set in the sequential upgrade is the day your people are moved from the waiting room into the actual program.