Help & troubleshooting for network issues, including connecting your device to your home Wi-Fi network, connecting to public networks, troubleshooting wireless issues & ethernet connections, and optimizing streaming performance.
AWS - Amazon Web Services for cloud storage and web hosting and probably other things.
My guess is that it is to download picture that you can see on Roku home screen on the right side. In plain English - advertisement and probably tracking of what you watch and your habits so data can be reported to NSA, CIA, FBI, and KGB.
PS For a few weeks I was using AdGuard DNS and picture on my Roku home screen disappeared. Then I switched back to my ISP DNS and picture came back. Would you mind sharing DNS of those AWS hosts so I can add them to my HOSTS file, please?