A campaign flow is a sequence of Actions within a campaign which defines the overall campaign experience for associated prospects. When participating in a campaign, a prospect always starts in the Primary Flow. Beyond the Primary Flow, a campaign can contain multiple flows. Adding additional flows to a campaign allows you to further segment your Target Audience based on specific defined criteria.
To add additional flows to your campaign, click Add Flow within the Campaign Builder, and then provide a name for your new flow. Once a new flow has been added to your campaign, a prospect can only be moved from one flow to another using the 
Go To Action or 
Jump Action.