When you visit the details page for a campaign, you'll see the "Attribution" tab within the Campaigns tool, labeled [New]:
Asset type by contacts created
Assets by contact created
Interaction source by contacts created
Interaction type by contacts created
Asset type by deals created
Assets by deals created
Interaction source by deals created
Interaction type by deals created
Deal stage by deals created
Deal by deals created
Asset type by revenue
Asset by revenue
Interaction source by revenue
Interaction type by revenue
Deal by revenue
This feature is currently available for Marketing Hub Enterprise customers.