Pidgins are contact languages that develop for communication between groups with no shared language. They are simplified mixtures of existing languages, prioritizing ease of learning over complete grammar. Pidgins form where trade or migration brings groups together, adopting vocabulary from dominant groups but syntax from subordinate ones. They lack morphology and replace inflections with separate words. Pidgins have their own structured rules and communities of users, making them independent languages rather than "bad varieties" of the languages they incorporate.