Virtual means nothing is real. In this concept, no actuality exists. In general, we just create an instance of something that we want to use. In cloud computing, this instance can be a server, desktop, some OS, and network instances.
In this concept, the instance which is being created is used by multiple users or customers. Now how that instance is used and how it's been assembled that's been explained in this section. Let's understand this little better by learning the concept in a deeper context.