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What is Cloud computing?
Cloud computing means using computers owned by someone else, over the internet, instead of your own.
- Category Building with AI
- Updated 20 Oct 2026
Cloud computing, explained simply
The cloud isn't a cloud. It is large buildings full of computers that you rent time on.
You can store files, run apps, or train AI without owning that hardware.
For example, when you chat with an AI assistant, the work happens on a company's cloud machines, not on your phone.
You pay for what you use, or you use a free tier.
On ITG Now, our AI news and tool guides say when a tool runs in the cloud and when it can run on your own computer.
Related terms
Data centerSaaSSelf-hostingLocal AIGPU
Questions people ask about Cloud computing
Is cloud computing safe?
Big providers invest heavily in security, but you still need strong passwords and careful settings.
Cloud vs local: what is the difference?
Cloud means it runs on someone else's computers. Local means it runs on yours.
Do I use cloud computing already?
Almost certainly. Online email, photo backups, and streaming all run in the cloud.