You can organize contacts into segments called contact groups. Segmentation allows you to divide your website's visitors and users into groups of people with shared characteristics, which you can then accurately target in your on-line marketing efforts (such as E-mail marketing). You can either add contacts to groups manually or set up the system to assign contacts to groups automatically based on conditions.
Contact groups can be site-specific or shared across all websites in the system (global contact groups). Contacts can belong to any number of different contact groups.