SMSjunction Groups and Channels
There are several differences between SMSjunction Groups and Channels. Here are the main ones:

SMSjunction Groups
SMSjunction Groups are made up of a group of people who exchange messages with each other. Anyone can start a Group. Anyone can send out a message to the entire Group or to any individual member of the Group.

If a Group is public anyone can join (no approval required for membership.) If a Group is private anyone can ask to join but the Group founder still has the final say on who gets in. If a Group is secret you can only get in if you get an invite from one of the Group members.

If you get tired of a Group you can put it on hold at any time by changing your Active mode to Away on your personal Home page. You will not receive any messages while in Away mode but you will still have access to your Group Home page where you can read and listen to messages.

SMSjunction Channels
SMSjunction Channels are made up of a group of people who may or may not know each other. Only the Channel founder can send out messages to the Channel.

If you and another member share a Channel but no Groups you will not be able to exchange messages with each other. This is done for your protection.

There is no approval process to join a Channel. Any SMSjunction member is automatically admitted after clicking the channel's "Join" button.

If you get tired of a Channel you can put it on hold by clicking the "Active" toggle to "Away" on your Home page. When you wish to continue receiving the channel's content simply click the toggle back to "Active".