The document discusses how to build a fully functional online store using Ecwid by adding an Ecwid store to a Facebook page. It provides step-by-step instructions on setting up a free Ecwid account, creating the store and adding it to a Facebook page, adding products, customizing settings, setting up payment and shipping options, and testing the store. The goal is to have an online store that is fully functioning on a Facebook page and ready to start selling products.