A smart mob is a group whose coordination and communication abilities have been empowered by digital communication technologies. Smart mobs are particularly known for their ability to mobilize quickly.
The concept was introduced by Howard Rheingold in his book Smart Mobs: The Next Social Revolution. Rheingold defined the smart mob as follows: "Smart mobs consist of people who are able to act in concert even if they don’t know each other... because they carry devices that possess both communication and computing capabilities". In December of that year, the "smart mob" concept was highlighted in the New York Times "Year in Ideas".
These technologies that empower smart mobs include the Internet, computer-mediated communication such as Internet Relay Chat, and wireless devices like mobile phones and personal digital assistants. Methodologies like peer-to-peer networks and ubiquitous computing are also changing the ways in which people organize and share information.
Smart mobs sometimes are manipulated by the dispatchers who control the 'mobbing system' (i.e., those who own the contact list and the means to forward instant messages to a group) and are induced to cause distress and aggravation to individuals who have been targeted or singled out for whatever reason.
There is a tendency to keep the dynamics of smart mobbing 'covert', and not to discuss such incidents on the internet.
Flash mobs are a specific form of smart mob, originally describing a group of people who assemble suddenly in a public place, do something unusual and pointless for a brief period of time, then quickly disperse. The difference between flash and smart mobs is primarily with regards to their duration: flash mobs disappear quickly, but smart mobs can have a more enduring presence. The term flash mob is claimed to have been inspired by "smart mob".