TY JOUR TI Analysis of modern digital communication channels and evaluation of the effectiveness of their use in marketing management PJSC NK Rosneft KW digital communication channels KW digital transformation KW marketing management KW Rosneft Oil Company KW a model for evaluating the effectiveness of digital communication channels JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Shapovalov, M.I. PY 2026 IS 0 PB ITBO University