Venmo is a mobile payment service that allows users to transfer money to one another using a mobile app. It is owned by PayPal and is popular among younger generations for splitting bills, paying friends back, and making purchases online. Users can link their bank accounts or debit/credit cards to their Venmo account to easily send and receive money. Transactions can be made public or private, and users can add notes and emojis to their payments. Venmo also offers a social feed where users can see and interact with their friends' transactions.