WooCommerce is a plugin created to ensure seamless integration with WordPress. It is one of the most popular e-commerce solutions in the world. With its flexibility and access to hundreds of free and paid extensions, WooCommerce currently accounts for approximately 30% of all online stores. By installing the WooCommerce plugin you get a fully functional payment management system. Plug-ins available for WooCommerce 2.x and WooCommerce 3.x versions.