Chrome Remote Desktop is an add-on for the Google Chrome web-browser that can function as an RDP client. For the laymen, this means that you can connect to a machine through an internet connection, performing the same tasks you would perform remotely as if you were physically in front of the machine you are accessing. So, for example, if you have a technical problem and need someone to help fix it, you could send someone your connection information and they would be able to control your machine while you watch what they do. Or, if you want to carry around a very lightweight, but weaker device and still use desktop applications, this will let you do so, so long as you have the correct connection details. However, users are authenticated through your Google profile and connections must be authorized before they are allowed to connect, so there is a layer of security disallowing just anybody from being able to access your computer.
I like this particular extension because it is a lot easier to configure than many other RDP clients, and works on several different operating systems: Windows, Mac OS, Linux (although at the time of this writing this is in BETA), and Chrome OS.
1. Install Chrome, if it isn't already.
If you don't already have Chrome, go ahead and download chrome from https://www.google.com/chrome/. This is very likely to change at some point in the future, but Google makes it very easy to download. It should choose the appropriate installer for your particular computer and download it to wherever your default download directory is.
Once downloaded, go ahead and run the installer. Default settings are probably okay. Again, this is very likely to change, so I won't go into specifics because they are likely to be outdated at some point.
2. Install Google Remote Desktop extension
Once Chrome is installed, run the application. Note: On Mac machines, if you can't find it in your Applications folder even though you know you just put it there... its actually named "Google Chrome", so it's located further down the menu than you'd anticipate!
In Chrome, go to https://chrome.google.com/webstore/detail/chrome-remote-desktop/gbchcmhmhahfdphkhkmpfmihenigjmpp?hl=en. If this link breaks, you can probably have success just searching for "Chrome Remote Desktop" in Google and going with the first result. If you find that the link is broken, leave a comment below and I'll fix it.
Google has also provided these useful links if you can't find it:
You should see something similar to the following image. Press the "+ADD TO CHROME" button (located in the top right corner) to install it.
The following box should pop up asking for permissions. Read through them and hit "Add app" if you're okay with what it does. I don't see anything alarming, and have no problems using the application myself, for what its worth.
3. Running Chrome Remote Desktop
In the address bar at the top of the screen, navigate to "chrome://apps".
A list of your Chrome applications will appear, as shown below:
Sidenote: If you would like to add the Chrome Remote Desktop application to your Windows Start Menu, Mac Applications folder, etc., right click on Chrome Remote Desktop and press Create Shortcut...
A box will pop up that should look something like the following image. You can check the box for what locations you'd like to see the application in, then press Create. Otherwise, you'll have to go to "chrome://apps" every time you want to launch it. If you don't use it frequently, that probably isn't a big deal.
To open the extension, either left click on the extension Google Remote Desktop in "chrome://apps" as notated rather elegantly by my giant red box and "CLICK HERE" in the above image...
or navigate to the location where you created your shortcut. They'll both take you to the same place.
4. Using Chrome Remote Desktop for Remote Assistance
Once you have opened the application, you should see a screen that looks similar to this. To get remote assistance, press the Get Started button in the remote assistance box.
The window should change into something like the following image. Press Share.
A box with a string of bold numbers will appear. Give this set of numbers to the person who you want to gain access to your machine. (Don't worry about the spaces, they're just for the sake of conveying the long number, they don't need to be entered by the person accessing your machine.)
Once they enter this number in...
They should have access to your computer now and you can watch as they assist you. If for some reason you wish to terminate the connection, there is a bold, green box at the bottom of the screen. All you would have to do is press the Stop Sharing button.
Once they are disconnected, that number will no longer work, so you'll have to use a new one each time you get help.