the "physical" assets created to fulfill the needs of the distribution deal. The means of reaching the target audience.
Examples...
Marketing Funnel Pages
Emails
Webinar
Checkout System
Sales team
You're building out the Distribution Mechanism that both parties have agreed to, either internally or with subcontractors.
Return to the lemonade analogy... neither the home owner nor the lemon farm has a lemonade stand. The stand is the mechanism of distribution, it's the sales & marketing materials that informs the target audience on the street that you have healthy, refreshing, life changing lemonade for sale!
[Increase Distribution] You can also create other partnerships to further improve the performance of your Distribution Mechanism, your lemonade stand. You could, for instance, convince client A or B to pay for more advertising and split the profits, or get the distributor to promote another product of the product producer.