Cloud Computing is a technology that enables on-demand access to computing resources—such as servers, storage, databases, software, and networking—over the internet. Instead of owning and maintaining physical IT infrastructure, organizations can rent these resources from cloud service providers, allowing for greater flexibility, scalability, and cost efficiency.

Infrastructure as a Service (IaaS):

Provides virtualized computing resources like servers, networks, and storage.
Example: Amazon Web Services (AWS), Microsoft Azure, Google Cloud Platform.

Platform as a Service (PaaS):

Offers a development environment with tools and frameworks to build, test, and deploy applications.
Example: Google App Engine, AWS Elastic Beanstalk, Heroku.

Software as a Service (SaaS):

Delivers software applications over the internet on a subscription basis.
Example: Microsoft 365, Salesforce, Zoom.