If you sell online through your Wordpress website, then chances are you are using WooCommerce. Their platform covers over 42% of all eCommerce sites, so it's quite easy to see why.
WooCommerce is a free plug-in with a range of options and possibilities; from simple shops to massive brands such as All Blacks. WooCommerce supports a wide range of payment methods so you're never tied down to one single solution.
If you want to read more fun facts about WooCommerce, here is an amazing infographic by websitebuilder.org.