The basic idea behind an online drop shipping business is that, as a small business owner, you don’t have to maintain a large inventory (or any inventory whatsoever) of products or handle any delivery to your customers. That eliminates the financial cost and risk of having a warehouse full of stuff you might not sell, and the hassle of arranging to send orders all over the country or the world. In fact, you don't have to manufacture or store any products at all. How To Make Over $1,000 Per Month Selling on Poshmark & Mercari | Tips & Tricks For Selling Online
Once you have that problem or need nailed, the next step is to validate that idea and make sure you’ve actually got customers who will pay for it. This means building a minimum viable product, getting objective feedback from real customers, incorporating updates, testing the market for demand, and getting pricing feedback to ensure there’s enough of a margin between your costs and what consumers are willing to pay.