What is Scalability of Web Applications?

Scalability of web applications refers to the ability of an application to handle an increasing amount of traffic, users, or data without experiencing performance issues or failures. In other words, scalability refers to how well an application can grow and handle more workload as the demand increases.

Scalability is essential for web applications because as the number of users and the amount of data grows, the application must be able to handle the increased demand without affecting performance or availability. There are different types of scalability, such as horizontal scalability, vertical scalability, and functional scalability, each addressing different aspects of an application's ability to scale.