A "Select Menu" is a user interface element that allows users to choose one option from a list of available choices. It typically appears as a dropdown list, where clicking on it reveals various options. This feature is commonly used in websites and applications to streamline the selection process and save space on the screen. Select menus are often used in forms, such as when filling out personal information or making a purchase. They help users make decisions quickly and efficiently by presenting a clear set of options, reducing the likelihood of errors in data entry.