Card sleeves also allow for easy organization and viewing of your cards. They are often transparent, which allows you to easily see the card inside without having to take it out of the sleeve. They also come in a variety of colors, which can be helpful when organizing different types of cards, such as credit cards, IDs, and business cards.
Card sleeves are also popular among gamers, especially card game collectors, as they provide added protection for the cards. It's also a common practice to use sleeves to store and protect rare, valuable, or hard-to-find cards. Many card game players also use sleeves to shuffle their cards more easily and to prevent their cards from getting damaged during gameplay.