Email notifications are the primary way to get notified of new activity on Get Satisfaction. This could be new posts in the community, in categories that they follow, replies to conversations that they follow, and more.
The email notifications will include the custom colors selected for your community design, the profile picture of the user who has posted, and a quick link for you to access the conversation directly. If the notification is for a private conversation or for a topic posted in an access controlled category, that will also be noted by an icon in the email notification.
There are different sets for users of a community and employees of a community.