It's simple to set up, and as long as your phone has a data connection you'll be able to send and receive messages via the WhatsApp service right from your PC.
How to Scan QR Code..?To connect your web browser to your WhatsApp client, simply open https://web.whatsapp.com in your Google Chrome browser. You will see a QR code --- scan the code inside of WhatsApp, and you're ready to go. You have now paired WhatsApp on your phone with the WhatsApp web client. Your phone needs to stay connected to the internet for our web client to work, and please make sure to install the latest version of WhatsApp on your phone.
Unfortunately, there's no web solution at this time for iOS users because of limitations of the platform. You will have to wait.