The two actions that can be used to change a prospect’s Marketing Cloud Account Engagement campaign are:

Create an automation rule to change Marketing Cloud Account Engagement campaign for prospects meeting certain criteria. An automation rule is a rule that runs continuously in the background and matches prospects based on the criteria you set. You can use an automation rule to perform actions on the matched prospects, such as changing their Marketing Cloud Account Engagement campaign to the one that is relevant to their attributes or behaviors.

Manually change the prospect’s Marketing Cloud Account Engagement campaign when editing the prospect record. You can also change a prospect’s Marketing Cloud Account Engagement campaign by editing their prospect record and selecting a different campaign from the drop-down menu. This is useful when you want to change the Marketing Cloud Account Engagement campaign for a single prospect or a small group of prospects.