As defined by the Organisation for Economic Co-operation and Development (OECD), e-commerce is ‘the sale or purchase of goods or services over computer networks by methods designed for the purpose of receiving or placing orders'. This encompasses ‘orders made over the web. To be excluded are orders made by telephone calls, facsimile or manually typed e-mail’. It may involve sales and purchases made on companies’ product websites, whereas online platforms enable interactions that must be conducted online and that involve multiple participants.