Google Storage is a file hosting service. To simplify the picture, Google Storage provides businesses that need to primarily machine work with files the same as, for example, Google Drive, Microsoft OneDrive, and many others. It provides space for personal use or for sharing between users.
Google Storage allows you to define the lifecycle of an object. It includes a detailed sharing system and many other things you would expect in a file hosting service.
Why and how we use Google Storage
We realistically use Google Storage out of necessity, as Google Cloud Platform tools that are not used for storing information do not have their own storage. If we want to use any of these tools we need to store the data somewhere.