Zettle by PayPal is a mobile point-of-sale (POS) system. It enables users to accept various payment methods, including credit and debit cards and contactless payments. Zettle integrates with PayPal's payment ecosystem, facilitating transaction processing and financial management. The system includes features for inventory management, sales tracking, invoice creation, and access to financial reports. The accompanying mobile app allows businesses to accept payments remotely and view real-time transaction data. Zettle provides a mobile POS solution that supports the financial management needs of small businesses.