WooCommerce is an open-source e-commerce plugin for WordPress. It is designed for small to large-sized online merchants using WordPress.
The plugin quickly became popular on it's release in 2011 for its simplicity to install and customize. It is flexible enough out of the box to handle most needs. The skill with WooCommerce is knowing what options are necessary and most cost effective to achieve, from cart abandonment to re-marketing.
We've built online trading websites with WooCommerce such as Rory Dobner. We'd be happy to talk if you're interested in setting up an online business.