A pop-up is a type of graphical user interface element that appears suddenly on the current screen or window. Pop-ups are commonly used on websites to draw attention to various types of content, such as advertisements, alerts, or sign-up forms. They can be triggered by a user’s actions, such as clicking a button, or they can appear automatically after a specific time. While pop-ups can be an effective way to engage users and drive conversions, they can also be intrusive and annoying if overused or designed poorly. To create effective pop-ups, it is important to balance the user’s needs and experience with the business goals, such as presenting a clear message and incorporating easy-to-find close buttons.