Have you ever uploaded a photo to Google Drive, watched a movie on Netflix, or listened to music on Spotify? If yes, then you've already used the cloud.

In this article, we'll explore what the cloud actually is, why businesses moved to it, and how concepts like IaaS, PaaS, and SaaS can be understood using a simple pizza analogy.

Introduction: The Pen Drive Era vs. The Cloud Era

Do you remember when we had to buy CDs to listen to new music? Or when we had to wait for a 16GB pen drive to copy movies from a friend? We do not do that anymore. Today, we simply open Spotify or Netflix and stream instantly. To save our documents or photos, we use Google Drive instead of carrying physical hard drives. This is the most basic, everyday example of Cloud Computing.

In simple words: You no longer need to "buy" and keep storage or software physically with you. Instead, you rent them over the internet.