Cloud computing is the on-demand delivery of servers, storage, databases and software over the internet, paid for by usage. Teams rent capacity from a provider instead of buying and running their own hardware.
Cloud migration is the process of moving applications, data and infrastructure into a cloud environment. The source may be an on-premises data centre or another provider, and services must stay running and secure throughout.
Public, private and hybrid cloud are the main cloud deployment models, describing where computing resources run and who shares them. Public cloud is shared provider infrastructure, private cloud serves one organisation, and hybrid connects the two.
SaaS, PaaS and IaaS are the three main cloud service models, each defined by how much of the technology stack the provider manages for you. IaaS rents raw infrastructure, PaaS adds managed runtimes, and SaaS delivers a finished application.
A cloud architect designs how an organisation's systems run on cloud platforms, choosing services, network layout, security controls and cost structures. Businesses bring one in before a migration or when cloud sprawl and spend become hard to control.
FinOps is an operating practice that brings engineering, finance and business teams together to manage cloud spending. Teams share visibility of costs and make trade-offs between speed, quality and spend.
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