In the mighty and heavy world of Web sites, the thing called Web Application Architecture is highly important yet not many have much known about it. So, what it exactly is? Web Application Architecture is a framework that’s comprised of the relationships and interactions between application components, such as middleware systems, user interfaces, and databases.

The general concept of Web Application Architecture is in line with the concept of a browser user who triggers an application that is capable of running in multiple websites. There is so much about this which I suggest reading through this https://svitla.com/blog/web-application-architecture