Chrome Remote Desktop is a free remote desktop application from Google that runs as an extension within the Chrome web browser.
How to Use Google Chrome Remote Desktop
You can use it to set up any computer running Chrome as a host computer that you can connect to at any time, regardless of whether the user is logged in or not, for full unattended access. It's also useful for temporary, on-demand, one-time access/support.
There are a number of other free remote access tools that are more robust, but Chrome Remote Desktop is certainly easy to work with:
Like all remote access programs, Chrome Remote Desktop works when there is a client and host connected to each other. The client connects to the host to control the computer.