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2) All stories need to be published. For each story click on edit and under "Workflow" select "Published" instead of "Draft"
The Simulator is the tool that allows you to test dynamic creatives and the paths created with the Journey Designer and the Storyboard in a simple and effective way.
Click on the symbol at the right top to open the dialog window and simulate the change of context via the dropdown list.
Press to confirm the change of context and simulate another impression.