To use PayPal, first sign up for a free account on PayPal.com by choosing either a personal or business account and providing your personal details. Link your bank account, debit card, or credit card to your PayPal account to fund payments and withdraw money. You can send money by entering the recipient's email address or phone number, specify an amount and currency, and choose your payment method. PayPal allows sending money to friends and family or paying for goods and services securely. You can also request money from others, create invoices, and manage transactions through the PayPal dashboard or mobile app. When shopping online, select PayPal at checkout, log in using your credentials, and pay without exposing your card details. PayPal offers buyer protection and keeps your financial information private during transactions.