Groups are specialized list fields that correspond to fields on your signup forms. They let you ask your contacts to self-categorize with preset responses that you provide. For example, a garden shop might ask their contacts what best describes them: a gardener, landscaper, or indoor plant enthusiast. After contacts self-select their interests, you can create internal tags based on group data, or send email campaigns to a segment containing one group, a few groups, or all of them.
One of the reasons I signed up with WA is because I was having problems filling out the info on Aweber. I couldn't figure out where my affiliate link was supposed to go. I still don't know. I've listened to YouTube tutorials then when I try to do what they say I get confused or have questions and there is no one to ask. One day I'll see the live chat button the next day it's gone. I know it's me but it is so frustrating.