nopCommerce chat plug-in will allow the user to chat with administrator (store owner). Chat plugin allows the user to chat using www. zopim.com account.
It is nopCommerce 4.20, 4.0, 3.9, 3.80 and 3.70 supported standalone plugin.
It is easy to install and configure the plugin and you are good to go ahead to use it in your nopCommerce Store.