Start Target Group Optimization 
In campaign automation, the workflow templates that belong to the campaign automation task set can be assigned to individual campaign elements.
The start target group optimization workflow should only be used in conjunction with a subsequent optimization element. The target group assigned to the campaign element is divided into sub-target groups according to the parameters and constraints defined in the optimization element. These are assigned to the subsequent campaign elements.
Prerequisites
Classify the workflow template as a General Task. 
Customer Relationship Management 
Marketing Marketing Planning and Campaign Management Campaign Automation Implement Workflow Customizing 
After starting the campaign, the workflows are scheduled and executed automatically. For this reason, no type linkages need to be made for this workflow template.
Process
The start target group optimization workflow should only be used in conjunction with a subsequent optimization element. The target group assigned to the campaign element is divided into sub-target groups according to the parameters and constraints defined in the optimization element. These are assigned to the subsequent campaign elements.
The following campaign element data is checked as part of campaign process modeling: A segment must be assigned and the indicator 'Start for Every Respondent' must be deactivated. The system also checks whether the next step in the campaign process flow is an optimization node.
Technical Implementation
The following information is of a technical nature. You need this information if the implementation details are relevant to you, or if you wish to make your own enhancements.
Workflow Template
The actual business process is implemented in the workflow template WS14000068 (CRM_CA8).
Object Types
BUS2010022 (Campaign Element)