An app drawer is a feature found on many smartphones and tablets that organizes and displays all installed applications. It allows users to access their apps in one convenient location, rather than cluttering the home screen. Users can open the app drawer by swiping up or tapping an icon, depending on the device's interface. In the app drawer, applications are typically arranged in alphabetical order or can be sorted into categories. This feature is common in operating systems like Android and helps users quickly find and launch their desired apps without searching through multiple home screens.