You can send a newsletter to everyone. Send a bulk email to a targeted group of people.
By default, the newsletter group will send to everyone in your database. When you add a contact, they are added to this group for you. Contacts can unsubscribe though.
The system keeps a history of sent emails. You can see undeliverable, read counts and link clicking statistics. You can drill into these and get details of the contacts making them up.
Besides sending a newsletter, you can email specific groups of people. This enables you to target relevant groups of people for your campaign.
This video shows how groups and profiles work in the system. You can use the profiles and groups for reporting. Used for bulk email, SMS, events, surveys and printed letters.