Web design is the process of creating and designing websites, including layout, structure, user interface, and visual appearance. It involves combining various elements such as text, images, and multimedia to create an aesthetically pleasing and functional website that meets the needs of the target audience. A well-designed website is crucial for attracting and retaining visitors, communicating a clear message, and achieving business goals.

UX (User Experience) design and UI (User Interface) design are disciplines that focus on creating effective and enjoyable experiences for users interacting with digital products, such as websites or mobile applications. UX design involves researching and understanding user needs and behaviors to inform the design of a product's functionality and flow. UI design focuses on the visual and interactive elements of a product.

An Android app is a software application that runs on the Android operating system, which is used by a wide range of mobile devices, including smartphones, tablets, and smartwatches. Android apps can be downloaded and installed from the Google Play Store, or from other third-party app stores or websites. They can perform a wide range of functions, from games and entertainment to productivity and communication tools.