This report provides an overview of web application development, emphasizing the Model-View-Controller (MVC) architecture and client-server communication. The report begins with an introduction to web applications and their various types, setting the stage for a discussion on the MVC architecture. The MVC section explains the three core components: the Model, View, and Controller, and how they contribute to building scalable and extensible web applications. The report then explores how MVC architecture is applied in web application development, highlighting its role in managing errors and streamlining the development process. The second part of the report focuses on client and server interaction, detailing how clients and servers work together to facilitate data communication within web applications. It explains the significance of client-server technology, including its key elements such as database servers, client applications, and networks, and how they enable effective data transfer. The conclusion summarizes the key findings, reinforcing the importance of MVC architecture and client-server technology in developing robust and efficient web applications. The report references several sources to support its findings.