What's the most important thing for marketer, the channel of distributors or the customer?

Customers more important because if marketer will understand customer needs, it would be easier for him/her to find  appropriate and relevant distribution channel.

both are important, customers who will buy product and distribution channels which facilitate availability of product for customers. 

M perfectly sure both becoz without distributors customers have no access to your product and when they cant reach the product they wont but it even if u present and close the sale.

Both are of equal importance because if channel of distribution is poor that marketer may not reach on time to the customer or may not deliver on time and if customer is not there then channel of distribution to such area is waste of resources and efforts.

The most important thing for a Marketer is customer because if you know who is the customer then you can think of ways by which you take your product to the customer. 

Distributor’s vision is one of entering through the channel and not through the customer. We prefer to start out by looking at customer behavior. We have now formalized eight typical customer journeys. It is a valuable tool, used by the product managers for their launches. It helps them identify the strengths and weaknesses of each offering and launch. These customer journeys are free of the channels. You might even say that product managers are on their own customer journey and can decide which channels they want to focus on at different stages.