From the Document: "Online transactions through e-commerce allow customers to research and purchase goods without leaving their home or office, increasing access and convenience. Using online sales, businesses are able to scale efficiently and reach customers in new markets, both domestically and abroad, especially small and mid-sized enterprises (SMEs). Although some online purchases replace what may have been in-store transactions, other purchases are new sales."
CRS In Focus, IF11194
Congressional Research Service: https://crsreports.congress.gov/