Trading cards are collectible cards that feature images and information about various subjects, such as sports, video games, movies, or comic books. Each card typically includes a picture, statistics, and sometimes a brief description. They are often sold in packs and can be traded among collectors, making them popular among fans of different interests. Many trading cards are produced in limited editions, which can increase their value over time. Some collectors focus on specific themes or sets, while others aim to complete entire collections. Trading cards can also be used in games, where players build decks and compete against each other.