The method of ecommerce with the least involvement is dropshipping. Dropshipping is a fulfillment method in which an online retailer does not keep products in stock but instead transfers customer orders and shipment details to the manufacturer, wholesaler, or another retailer who then ships the products directly to the customer.

In dropshipping, the retailer acts as a middleman, taking orders from customers and passing them on to the supplier. The supplier is responsible for inventory management, packaging, and shipping of the products. This means that the retailer does not have to handle or store any inventory, reducing their involvement in the logistics and fulfillment process.

One of the key advantages of dropshipping is that it requires minimal upfront investment. Since the retailer does not need to purchase inventory in advance, they can start an ecommerce business with limited capital. Additionally, dropshipping allows retailers to offer a wide range of products without the need for physical storage space.

An example of a dropshipping business is Oberlo, a platform integrated with Shopify that enables entrepreneurs to import products from AliExpress directly into their online stores. When a customer places an order, it is automatically forwarded to the supplier on AliExpress who then ships the products directly to the customer. The retailer's involvement is limited to managing the online store, marketing, and customer service.

Another example is Printful, a dropshipping service that specializes in customized print-on-demand products. Retailers can integrate Printful with their online stores and offer a variety of products such as t-shirts, hoodies, and mugs. When a customer places an order, Printful handles the printing, packaging, and shipping of the product, while the retailer focuses on marketing and customer support.

References:
- Shopify: What is Dropshipping? A Guide to Getting Started: https://www.shopify.com/guides/dropshipping/what-is-dropshipping
- Oberlo: How Does Oberlo Work?: https://www.oberlo.com/blog/how-does-oberlo-work
- Printful: How Printful Works: https://www.printful.com/how-printful-works