The six functions
Referential
Conveys information (eg. statements such as “the train leaves at 6am”).
Conative
Engages the addressee (eg. commands like “sit down!”).
Emotive
Interprets feelings, desires, etc (eg. interjections like “yuck!”).
Phatic
Establishes social connection (eg. greetings like “how are you?”).
Metalinguistic
Talks about language itself (eg. “What does phatic mean?”).
Poetic
Brings in the aesthetic dimension (eg. embellishing a message with quotations like “to be or not to be”).