Running a successful marketplace requires keeping an eye on all your vendors, as well as their product listings and order fulfillment performance. Because in most cases, vendors are responsible for their own inventory and orders, and need to be able to easily handle it all. Adding new products should be easy one at a time or in bulk through an import of a list. Because vendors edit products daily, adding descriptions, pictures, pricing, shipping methods, and discounts must be intuitive and easy.
Not all marketplace software will be able to handle the particular types of products your vendors will be selling. Products can also have many variations such as different size or color, each with their own inventory amount and purchase price. When selecting a platform, make sure it can handle the complexity of your offerings and let vendors easily keep track of it all.
Inventory is also not just about adding and showing products. To increase sales or total cart totals, you can bundle products, offer bulk discounts, or offer cross-selling and related products to entice extra purchases. Coupons or free shipping can be offered once a basket total reaches a certain amount, increasing more add-to-cart pushes. These all should be easily manageable by individual vendors and by the admin. There should also be product reports to show what is selling well, and what should be discontinued. Check through multi vendor features to make sure your platform can handle your inventory and sales needs.