The length of the channel of distribution depends on the number of intermediaries.
A short distribution channel could be:
Company > VAR > Customer
A long distribution channel could be:
Company > Distributor > Wholesaler > Retailer > Customer
All of these intermediary partners serve as a connection between a company and its customers. Intermediaries often aren’t occupied with manufacturing, for example, so they can devote themselves to marketing and sales.
For example, a manufacturer of dog leashes would have to create a huge sales department in order to have the same geographical reach as Pets at Home, for instance, and would not have the ability to pair its products with a wide range of complementary products, such as dog beds and food, and services like dog grooming.