WooCommerce is an eCommerce or Web Shop plugins for WordPress
It is the most customizable eCommerce platform for building your online business.
The advantage of using WooCommerce is – You can get LOTS of plugins are available which can help you setup different functionality as per your need. Also, lots of payment gateways, shipping gateways are present to help you easily setup payments
WooCommerce is now the most popular eCommerce platform on the web (stats from BuiltWith), so you can rest assured you’re in good company.