what does the Product Update check box mean in the Engagements editor's launch screen?

Hi Danny. The Product Update classification corresponds to the User Preferences category ‘productUpdate’. It functions simply to create a discrete category of engagements that can be opted in/out with that user pref. Often the ‘productUpdate’ category is used like an operational communications category.

So if a guide engagement is not configured as a Product Update, it would follow the ‘guidedTours’ pref, but if configured as a Product Update, it would follow the ‘productUpdate’ category preference.

For users where both users prefs are enabled, there won’t be any change in their experience.