Scalability is an attribute that describes the ability of a process, network, software or organization to grow and manage increased demand. A system, business, or software that is described as scalable has an advantage because it is more adaptable to the changing needs or demands of its users or clients.
Scalability mean that you prepared to handle the number of users, improvement, increase business demands, performance, and required thinks. scalability can perform on hardware, network, software, and database level.