Selling products through your own eCommerce website or through an online distributor is without question one of the best ways to get your product in front of more people, and bring in more revenue.
But as you know, a product will not sell itself online without proper descriptions, specs, images, and marketing copy. As a product owner/manufacturer/marketer, it's your job to develop, manage, and furnish this product info to your sales channels, be it your own website, or a 3rd party distributor.
Writing robust and compelling product copy is a topic all unto itself, which you can learn about here.