Web applications are software programs that run on a web browser, allowing users to access them from any device with internet connectivity. They are built using technologies like HTML, CSS, and JavaScript, enabling interactive features and dynamic content. Examples include online banking, social media platforms, and e-commerce sites. Mobile applications, or apps, are software designed specifically for mobile devices such as smartphones and tablets. They can be downloaded from app stores like Google Play or Apple's App Store. Mobile apps often provide a more tailored experience, utilizing device features like cameras and GPS, and are commonly used for tasks like messaging, gaming, and navigation.