WooCommerce is an open-source e-commerce plugin for WordPress, designed for use for any online merchant, large or small. The plugin was launched in 2011 and has already gained wide acceptance and popularity because of its inherent simplicity of installation and customization.
Powering more than 30 percent of e-commerce sites and several million active installs use WooCommerce, this plugin is more than just a plugin. By 2014, WooCommerce was already powering more than 380,000 sites (roughly 18% of all e-commerce sites). Solidifying it’s future stability and growth, in 2015, Automattic, the operator of WordPress.com, acquired WooCommerce together with WooThemes.
Considering that WordPress powers nearly 30% of all websites worldwide, this will be a major boost to the plugin’s exposure. I would anticipate WooCommerce to become a built-in, default option within WordPress. In fact, WooCommerce is expected to give older players such as Bigcommerce and Shopify a significant run for their money.