›the business activity that involves finding out what customers want, using that information to design products and services, and selling them effectively: Mr. Harris was previously director of sales and marketing.a marketing campaign/plan/strategyPart of her job involves devising clever marketing strategies.a marketing company/department/divisionHe operated his own marketing company until his major client got sold last year.marketing costs/expenses/budgetLoyal customers are easier to retain, so marketing costs for these customers should be lower.a marketing director/manager/officerHe was marketing director of colouring and skincare products and has recently been appointed overall marketing director.