Web development refers to the process of creating, building, and maintaining websites or web applications. It involves a combination of programming, designing, and deploying web-based solutions that can be accessed through Internet browsers. Web development involves designing and developing a website or web application's user interface (UI) and user experience (UX). It includes HTML (Hypertext Markup Language), CSS (Cascading Style Sheets), and JavaScript, among other technologies, to create the visual and interactive components that users interact with.