Ключевые слова: 2021, abbreviation, acronym, background, business, communication, community, competition, concept, connection, email, global, group, hierarchy, illustration, information, inspiration, internet, invest, investment, lead, leader, learning, level, management, market, marketing, mlm, motivation, multi, multilevel, net, network, online, paper, plan, relation, relationship, screen, share, show, social, society, solution, strategy, technology, text, web, website, word,