Web Development is the process after the web design. Development in the sense that all functionalities of the website like login, signup, and others functionalities that are the requirement of the website. With a good user-interface, the functionality of a website is the main aspect that fulfills the purpose of the website.
When I discuss the purpose of the website with my client then all functionalities are also discussed. I develop the website in modules one by one. Each module is developed and tested and then I do work on the next module. After the development and testing of each module, I test the complete website in one. After the complete development and testing of each module, I host the website on the Server.