If you own a Google Chromecast streaming device, you can easily share a browser tab in Chrome browser or even your entire desktop. This can be very useful when presenting from your laptop or if you just want to watch someone on a big screen that is only on your PC. The only requirement is you must be on the same network as your Chromecast device and using a recent version of the Chrome browser.
To get started, you will need to download the Google Cast browser extension for Chrome. You can download and install the free extension from the Google Chrome web store here. Just click the blue "FREE" button to install.
Once installed, you will see the cast icon in your google chrome browser next to the address bar.
Click the icon and you will see the Chromecast devices available for casting. Then just click on the Chromecast device name to share the current tab.
To share your entire screen, you will need to click on the down arrow icon after clicking on the cast icon. Then, select Cast screen/Window (experimental).
Finally, click on the name of the Chromecast device to begin streaming.