Channel sales is a sales model that relies on multiple third parties for product distribution.
The common sales channels include affiliate partners, resellers, distributors, dealers, agents, etc.
The model is very popular with SaaS businesses as well as retail brands. It can help you scale your sales operations, amplify your reach, and complement your in-house sales efforts serving as an additional source of revenue.
A channel partner is an organization that sells the products or services on behalf of the vendor acting as an indirect sales force. They can simultaneously work with several vendors as well as sell their own products/services.