Why are marketing channels and intermediariesnecessary? What is the most important function carried.

Why are marketing channels and intermediariesnecessary? What is the most important function carried out byintermediaries? Why? Why do channel arrangements sometimes must bemodified over time? QUESTION TITLE :- MKT Week 4 DQs

"Get 15% discount on your first 3 orders with us"
Use the following coupon
FIRST15

Order Now