Moving your infrastructure into the cloud is great for automation, unlimited scaling, and for pushing off the responsibility of hardware and data centers to someone else.
Outsourcing systems to public cloud give you the layer at the bottom labeled Cloud Infrastructure.

The “Not Covered by Cloud Provider” gap can be fulfilled by partners of the major public clouds including AWS, Google Compute Platform, and Microsoft Azure. We’ve worked with these providers and understand where they best perform to ensure your system are fully monitored and managed 24 hours a day.
By moving to public cloud, you are spared the hardware and physical data center responsibilities but the rest remain.