If you are using an automation to sync on a specific activation (and to add conditions), typically, beside when to initiate the sync you would leave all options (Created, Edited & Submitted) unselected. In this case you can use the Automation Action “Sync Site Data with Salesforce" which will appear once your Integration has been created.
If you have more than one program within your SM Apply site we strongly recommend using Automations to Sync to Salesforce as opposed to the default "When to Fire setting" within the Action.
With multiple programs in the site if you are not using automations to sync the actions, you run the risk of applications activating a sync for an action that is not related to the program of that application. This could result in errors in the log and blank or incorrect objects in your Salesforce environment.
If you wish to create a trigger to sync your salesforce action: