Distributors provide services such as warehousing and shipping product to stores. They are convenient for stores, since the buyer can purchase stock from a single catalog rather than individual manufacturers. Many stores prefer this convenience, so using a distributor increases the number of stores that are willing to carry your product. They also provide support such as product information, sales support, and demo/sampling services. Using these services can be a simple way to expand the capabilities of the sales function at your company without adding more people to your company.