Chrome Remote Desktop is Google's service for reaching a computer from another computer, phone or tablet. It is also used to share a screen, or to give and receive remote support. It works through the Chrome browser and Google's servers, and uses the WebRTC standard for the connection.
Computers running Windows, macOS or Linux (through a Debian package) can be set up as hosts for remote access, protected by a PIN. For one-off support, the person being helped generates a one-time code and shares their screen; Google's help pages say the sharing prompt asks them to confirm every 30 minutes. The remote computer can be reached from the web, or from the Chrome Remote Desktop mobile apps on Android and iOS. Google states that all sessions are fully encrypted, and administrators in managed Google environments can control who may use the service.
It suits individuals and small teams who need simple access to their own machines, or occasional help for a colleague. Google's pages do not list the tools that dedicated support products offer, such as file transfer between technician and user, session recording, chat or reporting. Its pages list no price.