Information Architecture or IA, can be defined as the science of labelling websites, organizing online communities and intranets that promotes findability and usability. Information Architecture strives to bring the principles of architecture and design onto the digital background and can be described as the basic design of shared information environments.
You have heard the word proportion in Architecture. If you want to call a Architecture classical, the key concept should be proportion, i.e, correlation of one element to another. Same in the case of UI. User Interface(UI) acts as a medium of interaction between the User and the Web. In a web application the most important aspect is the user interface, because this is the only part end users are going to view. Before we start, I want to you to know how we reached to this article"Why is proportion important in UI".