Mobile and web applications are software programs designed to run on devices like smartphones, tablets, and computers. Mobile applications, or apps, are specifically built for mobile devices and can be downloaded from app stores like Google Play or Apple's App Store. They often provide features tailored for on-the-go use, such as location services and push notifications. Web applications, on the other hand, are accessed through web browsers and do not require installation. They can be used on any device with internet access, making them versatile and easy to update. Examples include social media platforms and online banking services, which allow users to interact and manage tasks seamlessly.