A "pop-up" refers to a temporary event or business that appears suddenly in a specific location, often for a short period. These can be found in various forms, such as pop-up shops that sell unique products, pop-up restaurants offering special menus, or even pop-up art galleries showcasing local artists. They create excitement and attract customers by providing something fresh and different. In the digital world, a "pop-up" can also mean a small window that appears on a computer screen, usually containing advertisements or notifications. While some people find these pop-up ads annoying, they can also be useful for sharing important information or special offers.