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abbreviation, acquire, acquiring, acronym, advertiser, advertising, affiliate, black, blackboard, board, business, chalk, commerce, concept, cost, cpc, cps, customers, definition, development, hand, information, internet, investment, management, marketing, net, network, online, paid, pay, payment, per, phrase, ppc, publisher, revenue, sale, search, service, site, strategy, term, text, visitors, web, website, word,