Group's allow you to send to a subsection of an existing list you have.
They are defined by you choosing to upload data to it or a subscriber choosing to opt-in via a web form.
Choosing to use a group (rather than simply creating another list) provides the following benefits:
- If the list you're sending from is correctly managed you'll avoid sending to people that have unsubscribed in the past - BetterMail automatically removes them from the send.
- You'll be able to build both the list and the group each time you upload new subscribers. From there to can start to measure growth and other important metrics like engagement.
- You won't end up with multiple lists fully up your account making things confusing.