A demonstration can mean an event where people do something to let others know what they think and to try to change their point of view. It is one kind of protest. Examples of demonstrations include marches, where people walk together, and rallies, where people gather in one place. During a demonstration, the people who are part of it, called "demonstrators", may display placards or other symbols that are easy to see, especially when the protests are being shown on mass media such as news, television, or social networks.