What is cash app? 

Cash App is a mobile payment application that allows users to send and receive money quickly and easily. It is developed by Square, Inc. and is popular for its user-friendly interface and versatility. Users can link their bank accounts or debit cards to the app, and they can send money to friends or family, make online purchases, or even invest in stocks and Bitcoin. Cash App also provides a Cash Card, a physical debit card linked to the app balance, which can be used for everyday transactions. Additionally, Cash App offers features like direct deposit, stock trading, and cash boosts for discounts at select retailers.