Cloud robotics has meant a lot of things to a lot of people, and has gone by many aliases: robotics cloud infra, RobOps, fleet management, etc.
Regardless of what you call it, robots often need to be connected to services in the cloud. These can include:
We've put together a list of awesome resources, articles and tools about each of them:
https://github.com/Airbotics/awesome-cloud-robotics
There are plenty more great resources out there so please contribute them in and let's make it awesome!