Buying PlayStation Store credit allows you to purchase games, movies, TV shows, and other content from the PlayStation Store. You can buy credit using a credit or debit card, or by redeeming a PlayStation Store gift card.
There are several benefits to buying PlayStation Store credit. First, it allows you to avoid having to enter your credit or debit card information every time you make a purchase. Second, it can help you save money, as PlayStation Store credit is often sold at a discount. Third, it can help you keep track of your spending, as you can see how much credit you have left at any time.