Definition
In advertising, a key account is one of an advertising agency‘s major clients. “Key” may reflect the size of the client’s advertising budget, its profitability, percentage of total agency billings, or some other factor such as the prestige it gives to the agency that represents it.[1]
In sales, a key account is a large account—usually generating more than a prespecified annual sales level—that receives special treatment from salespeople.[2]
See also