For all e-commerce store based client websites, we implement the top global WordPress system add-on named Woocommerce.  One of the key differentiators of WooCommerce versus other eCommerce platforms is its tight integration with WordPress, meaning you get world-class commerce plus a powerful business website that has great content.  Note: for processing of customers it is the responsibility of the client to have the proper merchant systems in place for processing like PayPal Pro or other payment gateways. Two Ecommerce client examples: https://meafordfactoryoutlet.com/ https://mooredesignbirdfeeders.com https://www.dkrapparel.com/