Plastic cards are used for a variety of purpose, including:

1, Credit and Debit Cards: Plastic cards are commonly used to make electronic payments and withdraw funds from bank accounts;

2, ID cards: Plastic cards are used as proof of identify for employees, students and members of organizations;

3, Gift cards: Retailers and businesses issue plastic gift cards that can be used as payment for goods and services;

4, Membership Cards: Plastic cards are used to grant access to clubs, gyms and other membership-based organizations;

5, Loyalty Cards: As part of a loyalty program, many businesses offer plastic cards to customers that enable them to earn rewards or discounts;

6, Access Cards: Plastic cards are used to grant access to secure areas such as office buildings, parking lots and hotels;

7, Transportation Cards: Many public transportation systems use plastic cards as a method of payment for fares;

8, Health Insurance Card: Plastic cards are issued to individuals to provide proof of health insurance.

Overall, plastic cards are versatile and widely used in financial transactions, identification, access control, and loyalty programs.