WhatsApp is a messaging app that is used by millions of people in India. It is one of the most popular messaging apps in the world and has been around for over two years. To use WhatsApp, you need to create an account and then sign in with your phone number. Once you have signed in, you can start sending and receiving messages. You can also use WhatsApp to chat with friends and family. To send a message, you first need to open WhatsApp and sign in with your account information. Then, type the message you want to send into the text field and click on the Send button. If you want to receive a message, you first need to open WhatsApp and sign in with your account information. Then, type the message that you want to receive into the text field and click on the Receive button.