SFDC Campaign Filters :
Criteria used to select prospects based on their association with SFDC Campaigns or specific attributes within those campaigns.
Primarily used for segmenting and targeting prospects within marketing automation workflows.
Use cases: Usually in prospect segmentation based on their Job title, campaign status , geo location ... etc.
SFDC Campaign Actions:
Set of actions that can be performed on prospects based on their interaction with SFDC Campaigns.
Designed to automate marketing tasks based on prospect behavior within SFDC Campaigns.
Use cases: automatically adding prospects to SFDC Campaigns or changing their status within those campaigns