PayPal Credit is a digital credit line offered by PayPal that allows users to make purchases online and pay for them over time. It provides a convenient way to shop without needing a credit card, as it can be used at millions of online retailers that accept PayPal. Users can apply for PayPal Credit through their PayPal account, and if approved, they can access a revolving credit limit. This service often includes promotional offers, such as no interest if paid in full within a specified period, making it an attractive option for managing larger purchases.