How do they know about it?
The Marketing criterion examines how your target users will become aware of your product and be motivated to buy it, covering both the message and the channels through which it reaches them.
A strong answer identifies the channels through which the target user group already gathers information about products like yours, the message that will resonate with their specific need or motivation, and the cost of acquiring a customer relative to the lifetime value that customer generates. A weak answer assumes that a good product will market itself, or plans to reach a broad audience without a clear channel strategy or budget.
Marketing and distribution are closely related but distinct. Distribution answers how the product gets to the customer physically; marketing answers how the customer comes to want it in the first place. Both need to be viable for a product to succeed commercially, and both need to be evaluated against the same target user profile.