A membership card is a physical or digital card that identifies an individual as a member of a specific organization, club, or service. It often includes the member's name, membership number, and expiration date. Membership cards are commonly used by gyms, libraries, and retail stores to provide benefits such as discounts, access to exclusive events, or special services. These cards can also serve as a form of identification, allowing members to easily prove their status. Many organizations, like Costco or AAA, offer membership cards that grant access to various perks, enhancing the overall experience for their members.