You can Saves Phone memory by turn off the 'download media' on your phone and just use WhatsApp Web.You can easily send and download your Images and Videos to your PC.You can use bigger keyboard for typing and a bigger display for better experience of chatting.Also, you can open WhatsApp Web in an incognito window, but that logs out after an hour. In order to do that you will need to open WhatsApp Web in two different browsers, such as Chrome and IE.
You can use multiple Whatsapp accounts at the same PC. This also means that your phone's data connection is constantly being used. Your web session stays active as long as your phone has a connection to the internet. The WhatsApp web client uses your phone to connect and send messages – in a sense, everything is mirrored on your PC. The idea behind the web client is that you can use it while using a computer without the need to switch devices. You can view attachments but they will be available later only if you specifically download them. The web client of WhatsApp is temporary, so that nothing is stored on the PC. If you believe someone has access to your account via WhatsApp Web, above instruction forced to log out of all your active web sessions in WhatsApp on your mobile phone.
From Phone: open the menu > WhatsApp Web > Log out fromn all devices.From PC : Click on the the menu button then, log out.Nokia S60 and Windows Phone: go to Menu - WhatsApp Web.Nokia S40: Swipe up from bottom of screen - WhatsApp Web.BlackBerry 10: Swipe down from top of the screen - WhatsApp Web.BlackBerry: go to Chats - Menu - WhatsApp Web.Android: in the Chats screen - Menu - WhatsApp Web.Thats all, Whatsapp Web will be activated and you will be able to use the application within your web browser.