WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. WordPress is installed on a web server, which is either a component of an Internet hosting service or a network host in its own right.

Wix is a website builder that allows users to create and design their own websites. With Wix, you can create a website for free, using a drag-and-drop interface.

Shopify is a platform for setting up an online store. It offers a customizable platform, a simple checkout process, and a plethora of features to users. Shopify can be used to sell physical as well as digital products.

Dropshipping is a business model in which e-commerce entrepreneurs sell products without keeping any inventory on hand. When a store owner receives a customer's order, he or she simply contacts the supplier, who ships the products directly to the customer's door.