Web development refers to the process of building and maintaining websites. It encompasses everything from creating simple static web pages to complex dynamic websites and web applications. Web development involves various aspects, including front-end and back-end development, as well as full-stack development.

Front-end development focuses on what users see and interact with on a website, including the design, layout, and navigation. This aspect uses technologies like HTML, CSS, and JavaScript. Back-end development, on the other hand, deals with the server, database, and application logic, ensuring the website functions smoothly and securely. It typically uses technologies such as PHP, Python, and Node.js. Full-stack development combines both front-end and back-end work, allowing developers to work on all aspects of a website.

Overall, web development is vital for creating a functional, user-friendly, and visually appealing online presence, combining both technical expertise and creativity to bring ideas to life on the web.