1. SaaS — Software as a Service What it is: SaaS delivers ready-to-use software applications over the internet. You don’t install or manage the software yourself; it’s accessed through a web browser or app. User responsibility: You just use the software. The cloud provider manages everything behind the scenes — infrastructure, platforms, software updates, security. Examples: Google Workspace (Gmail, Docs), Microsoft 365, Salesforce, Dropbox, Slack. Use case: Ideal when you want to quickly use software without worrying about setup, maintenance, or infrastructure. 2. PaaS — Platform as a Service What it is: PaaS provides a platform and environment for developers to build, deploy, and manage applications without dealing with the underlying infrastructure. User responsibility: You focus on your application code and data. The cloud provider manages the servers, storage, networking, runtime, and middleware. Examples: Google App Engine, AWS Elastic Beanstalk,...