The key determinants of the globally developing e-commerce relate primarily to the implementation of ICT information technologies and advanced data processing technologies, i.e. industry 4.0 typical for the current technological revolution to the computerized, automated transaction systems supporting trade on online platforms. In addition, the use of blockchain technology for transaction security systems and data transfer on the Internet. The use of ICT and advanced data processing technologies i.e. industry 4.0 typical for the current technological revolution for e-commerce online transaction systems already applies to almost all the functioning of online stores, from computerized sales support systems, logistics, accounting, reporting, risk management to Internet marketing activities and improving security systems for online transactions. Another important determinant of the development of e-commerce is the development of online mobile banking available on mobile devices and new solutions related to the Internet of Things technology. Online banking is starting to dominate, whose development is determined by technological progress in the field of ICT and Industry 4.0 information technologies. Computerization is also increasingly affecting public sector institutions servicing tax systems and settlements of business entities. In addition, Business Intelligence analytical platforms supporting the management processes of companies operating also in the e-commerce sector have been developed for several years. The analyst of large information sets in Big Data databases is also developing. Big Data Analytics and Data Science analytical systems are also used by businesses operating also in the field of e-commerce. In recent years, new internet marketing instruments have also been developed, mainly used on social media portals, and are also used by companies operating in the e-commerce sector. Internet technology and fintech companies are also emerging that offer information services on the Internet to support marketing management, including the planning of advertising campaigns for products sold via the Internet. For this purpose, sentiment analyzes are used to survey Internet users' opinions regarding dominant awareness, recognition, brand image, mission, and offer of specific companies. Sentiment analysis is carried out on large data sets downloaded from various websites, including millions of pages of social media portals collected in Big Data systems. The analytical data collected in this way are very helpful in the process of planning advertising campaigns carried out in new media, including social media portals. These campaigns advertise products and services sold via the Internet, available in online stores. In view of the above, the development of e-commerce is determined mainly by technological progress in the field of ICT information technologies and advanced data processing technologies Industry 4.0 and new technologies used in securing financial transactions carried out via the Internet, including e-commerce transactions, e.g. technologies blockchain. I have described the above issues of various aspects of the application of IT systems, ICT information technologies, including Big Data, Business Intelligence in companies operating on the Internet in my scientific publications available on the Research Gate portal. I invite you to cooperation.