The web layer is also known as the presentation tier. The web layer provides a user interface that helps the end user to interact with the application. The web layer is your user interface (in this case, the website page), where the user enters information or browses for it. Web developers may build a presentation tier user interface in technologies such as HTML, CSS, AngularJS, Java Server Page (JSP), and Active Server Page (ASP). This tier collects the information from the user and passes it to the application layer.