A flash mob is a group of people who gather suddenly in a public place to perform a specific act, such as dancing or singing, for a short period of time. These events are often organized through social media or messaging apps, allowing participants to coordinate without revealing their plans to the public beforehand. Typically, flash mobs aim to entertain or surprise onlookers, creating a moment of joy or excitement. They can vary in size and complexity, ranging from simple dance routines to elaborate performances. Flash mobs have become popular worldwide, often associated with social media and viral videos.