Segmenting provides a great way to organize your contacts, and to also target specific people in your list. Segments do not appear in your Contact List dashboard, however when you select a contact list to send to, when creating a list, you’ll see the segments there should you want to send to only a part of your list.
There many ways to organize a list and each person will have their own way to do so. Segmenting allows you to keep the number of lists down, while still keeping your options open. Although creating another list is easier and simple, it is possible to end up with over 100 lists, making it extremely difficult to find contacts. Segments can be a permenant segment, or a once only segment as well.