WooCommerce

WooCommerce is a flexible, open-source commerce solution built on WordPress. 
Whether you’re launching a eCommerce business, taking an existing brick and mortar store online, or selling software you can get started quickly and build exactly the store you want.

WooCommerce is designed for small to large-sized online merchants using WordPress. 

Today, WooCommerce empowers small and medium businesses to build exactly the store they want and sell online.

A few reasons why WooCommerce is so popular are –

WooCommerce is free. Its an open source as anyone can go in and audit, modify, or extend the code. It’s regular person friendly. You don’t need to be an expert developer to launch a store. Its extensible.  You can add all sorts of new features to your store using “plugins,” without the need for any technical expertise. It works on all devices as most people shop on smartphones. WooCommerce is secure. It comes from an automatic billion dollar company with the resources to secure your store.