Both website and Facebook page is one form of web pages or HTML pages with some differences in its purpose, usage and features.
Website is the web pages to be viewed by the PUBLIC to give an overview about your company, your business, your products and services, your customers, your track records or past projects, online resources for your customers, and how to contact you. Whereas Facebook page (and any other social media platforms) is just a social media site for you to engage your target customers in a social way for better customer satisfaction and reach-out.
eCommerce or online shop or Marketplace is another form of web pages meant to facilitate the users to view, search, order product, make e-payment and track the parcel delivery status or shipment.
Of course there are many forms of web pages such as Intranet, landing page, digital brochures, digital name cards, FAQ, knowledge-base, e-learning, and so on.
All these different forms of web pages will make up your online business portfolio.
If you still do not have your own website for your business, it is time to design a new one. And if you already have one but an old and outdated one, it is time to redesign a new one specially for smartphone which is more stylish, trendy and most importantly, mobile responsive!