Platform as a Service - cloud platform that provides development tools and infrastructure so you can focus on building applications. Like renting a fully equipped kitchen where you just cook without worrying about maintaining appliances.
Heroku is PaaS that lets developers deploy applications without managing servers, databases, or operating systems.
All provide managed application hosting where the cloud provider handles much of the infrastructure and runtime operations. Elastic Beanstalk, App Service, and App Engine are classic PaaS offerings for deploying web apps/APIs with built-in scaling and health management. OCI has multiple adjacent options: Oracle APEX is a managed low-code application platform (PaaS), while OCI Container Instances is closer to container hosting; OCI’s PaaS story often depends on whether you’re building low-code apps, Java services, or containerized workloads.