Ключевые слова: advice, affiliate, affiliation, association, business, client, concept, connection, consumer, customer, development, direct, ecommerce, friend, information, internet, join, leads, marketing, mouth, net, network, of, online, organization, paper, plan, promotion, rate, recommend, recommendation, refer, reference, referral, review, share, spread, strategy, suggest, suggestion, suggestive, target, tell, testimonial,