In the IT environment, the term cloud is often used as a shorthand for cloud computing. It refers to an IT infrastructure where computing power, storage space, and software are no longer provided exclusively locally on an individual computer or a company’s own server, but are instead obtained over the internet from a distributed network of computers. These resources are located in large data centers belonging to cloud providers and can be accessed by users flexibly and as needed.
A key feature of the cloud is its location-independent availability. Users can access their data and applications using various digital devices—such as PCs, laptops, tablets, or smartphones—as long as an internet connection exists. This often eliminates the need to install software locally or to operate extensive in-house server infrastructure. The cloud thus functions as a central IT platform that can be reached at any time.
Cloud services are generally offered according to the “as a Service” principle. A distinction is made between Infrastructure as a Service (IaaS), where virtual servers and storage are provided; Platform as a Service (PaaS) for development and runtime environments; and Software as a Service (SaaS), where ready-to-use applications can be used directly via a browser. Billing is usually usage-based (“pay-as-you-go”), which enables high cost flexibility, particularly for companies.
The most important advantages include high scalability, automatic updates, worldwide availability, and easier collaboration, as multiple users can access shared data simultaneously. At the same time, aspects such as data protection, data security, internet dependency, and potential vendor lock-in must be carefully considered in order to deploy cloud solutions responsibly and efficiently.
