The group teaches the tools of recovery. The group gives you a chance to share. Members who are further along in the program teach you how they stayed clean and sober. The group gives you a chance to be honest about your addictive behavior. Members understand addiction like no one else ever will.
Addicts understand each other.
The group is your new peer group. The group members model healthy recovery. As the meetings go on you will need a sponsor. This is someone who has a stable recovery that you admire. Ask the group to write down their first name and phone number in case you need to call someone when you are tempted to become involved in your addictive behavior.