Ключевые слова: advertising, b2b, b2c, background, business, business to business, business to consumer, buy, c2b, c2c, client, commerce, company, concept, consumer, consumer to business, consumer to consumer, customer, ebusiness, ecommerce, economy, enterprise, internet, marketing, network, offline, online, partnership, purchase, relationship, sell, service, site, social, strategy, wallpaper, web,