The research focuses on exploring the structural and compositional features of blogs as a genre of professional Internet communication in the course of «Language of business communication». The tasks are outlined as follows: 1) to reveal the linguistic characteristics, functions, classification principles, and formatting rules of blogs; 2) to analyze blogs as a genre of professional Internet communication. The descriptive method and various types of linguistic analysis are applied. To develop students’ practical skills in professional blogging, analysis, and critical evaluation of posts by scientists, educators, and well-known public figures on the websites of reputable platforms in Ukraine, theoretical familiarization with linguistic features (stylistic, lexical, grammatical), functions (communicative, psychotherapeutic, educational, self-presentation, socialization, and others), classification principles (in particular, by authorship, by type of multimedia, by topic), and blog formatting rules (structural and compositional elements: profile, main page, individual entry/post page, friends’ feed), as well as practical analysis of the themes and structural and compositional features of the blogs by Oleksandr Ponomariv, Iryna Farion, and Taras Kremin are proposed. Posts by Oleksandr Ponomarev are grouped mainly with regard to the recommendations on language culture, discussing cases of violations of certain norms of literary language. Posts related to the history of language, sociolinguistics are also singled out. The posts demonstrate a combination of features from various functional styles of the Ukrainian language – scientific, journalistic, and colloquial. Posts by Iryna Farion are grouped in terms of the themes of the titles: about political life, problems of language policy; about prominent Ukrainians; letters, appeals; about scientific and teaching life, international relations. Such genre features of the posts as stylistic syncretism (features of journalistic, scientific, official-business, artistic, and colloquial styles), blurring the boundaries of taboo vocabulary, the use of stylistically reduced, jargon, and emotionally marked vocabulary, colloquial idioms, self-presentation (in particular, adherence to the orthographic norms of the Ukrainian spelling of 1928) are evidenced. Posts by Taras Kremin are proposed to be divided into three thematic groups: about the linguicide of the Ukrainian language by the Russian Federation, Russian aggression and propaganda, and counteraction to them; issues of the internal language situation and policy; international support for Ukraine, the Ukrainian language, and the status of the Ukrainian language in the world. The structural and compositional features of the posts, which demonstrate the important role of titles as external indicators of the text, a developed system of hyperlinks in the main body of the text, the accumulation of emotionally marked, evaluative vocabulary, grammatical and graphic markers, and the use of dialogization tools, are analyzed. Key words: «Language of Business Communication», b