Web and Mobile Development refers to the process of creating applications and websites that can be accessed on the internet or through mobile devices. This field combines various technologies, including HTML, CSS, and JavaScript for web development, while mobile development often involves languages like Swift for iOS and Kotlin for Android. Developers in this area focus on user experience, functionality, and performance to ensure that applications run smoothly across different platforms. They may also work with frameworks and libraries to streamline the development process, making it easier to build responsive and interactive applications.