Answer Description
Cloud Infrastructure, like all infrastructure, still requires special care to ensure it's security. Some of the benefits of Cloud Infrastructure are the pay-as-you-go model (usually per second or per minute billing), flexibility to create and delete servers on demand or automatically and the ease of provisioning complex services like database clusters without highly specialized experts.
Wikipedia
Cloud computing is the on-demand availability of computer system resources, especially data storage (cloud storage) and computing power, without direct active management by the user Large clouds often have functions distributed over multiple locations, each location being a data center Cloud computing relies on sharing of resources to achieve coherence and economies of scale The availability of high-capacity networks, low-cost computers and storage devices as well as the widespread adoption of hardware virtualization, service-oriented architecture and autonomic and utility computing has led to growth in cloud computing As of 2017, 90% of the public cloud runs a Linux-based operating system
Cloud_computing - Wikipedia, the free encyclopedia