Web development is the process of designing, building, and maintaining websites and web applications. It encompasses a range of activities, including web design, front-end development, back-end development, and database management. Web developers use various technologies and programming languages, such as HTML, CSS, JavaScript, and server-side languages like PHP or Python, to create functional and visually appealing websites. They ensure that websites are user-friendly, responsive, and optimized for performance across different devices and browsers. Web development also involves implementing security measures, integrating third-party services, and ensuring a seamless user experience to meet the specific needs of businesses and individuals.