Complete Information about WhatsApp Web App
WhatsApp Web is a desktop application that lets you send and receive messages from your mobile device. The web version allows you to view the list of your contacts on the phone while the conversations you're involved in your computer. We can also send and receive messages on the desktop application if you have a internet connection.
Read more here:- https://worldzo.net/whatsapp-web-and-how-to-use-it-on-desktop/