What is cloud computing?

Cloud computing is the delivery of computing services-like servers, storage, databases, networking, software, and analytics-over the internet (“the cloud”) instead of using a local computer or on‑premises hardware. You pay for what you use and access everything through a web browser or app.

Let's break it down

  • Infrastructure as a Service (IaaS): You rent virtual machines, storage, and networks, just like renting a computer in a data center.
  • Platform as a Service (PaaS): You get a ready‑made environment to develop, test, and run applications without managing the underlying hardware.
  • Software as a Service (SaaS): You use complete applications (like email or CRM) that run on the provider’s servers and are accessed via the internet.
  • Public, Private, and Hybrid Clouds: Public clouds are shared with many users, private clouds are dedicated to one organization, and hybrid clouds combine both.

Why does it matter?

Cloud computing lets individuals and businesses scale resources up or down instantly, reduces the need for costly hardware, and speeds up the deployment of new services. It also enables remote work, global collaboration, and access to advanced technologies (AI, big data) that would be too expensive to run locally.

Where is it used?

  • Websites and apps: Hosting everything from blogs to massive e‑commerce platforms.
  • Data storage and backup: Storing files, photos, and databases securely online.
  • Development and testing: Developers spin up environments quickly for coding and QA.
  • Streaming services: Video, music, and gaming platforms deliver content from the cloud.
  • Enterprise IT: Companies run ERP, CRM, and analytics tools in the cloud.

Good things about it

  • Scalability: Add or remove resources in minutes.
  • Cost efficiency: Pay‑as‑you‑go model reduces upfront capital expenses.
  • Reliability: Redundant data centers provide high uptime and disaster recovery.
  • Accessibility: Access your data and apps from any device with internet.
  • Innovation: Easy access to cutting‑edge services like AI, machine learning, and IoT.

Not-so-good things

  • Internet dependence: Without a stable connection, you can’t reach your services.
  • Security concerns: Storing data off‑site raises privacy and compliance questions.
  • Potential cost overruns: Uncontrolled usage can lead to higher-than‑expected bills.
  • Vendor lock‑in: Moving workloads between providers can be complex and costly.
  • Performance latency: Some applications may experience slower response times compared to local hardware.