In marketing, a card deck refers to a collection of printed promotional cards, typically postcard-sized, bundled together and mailed to a targeted audience, often as part of a direct marketing campaign. Each card within the deck advertises a different product, service, or company, allowing multiple advertisers to share distribution costs while reaching the same audience.
Card decks were commonly used in sectors such as B2B services, travel, education, and hobbyist markets. Recipients could request more information by returning a response card or contacting the advertiser directly.
While less common today due to digital alternatives, card decks were once an effective way to generate leads and product awareness.