The tutorial covers the current state of e-commerce in Russia and abroad. This manual meets the requirements of the Federal State Educational Standards of Higher Professional Education of the third generation and includes the following mandatory sections: all aspects of models and mechanisms for the implementation of the main types of e-commerce, the specifics of building information portals taking into account search engine optimization tasks, electronic money and electronic payment systems, including modern methods of ensuring information security, as well as examples and features of the use of information technologies in electronic marketing and online advertising.