In linguistics, a phatic expression is communication which serves a social function, such as social pleasantries that don't seek or offer any information of value. Phatic expressions are a socio-pragmatic function and are used in everyday conversational exchange typically expressed in situational instances that call for social cues. In speech communication the term means "small talk" (conversation for its own sake) and has also been called "grooming talking."
For example, greetings such as "hello", "how are you?" (in many contexts), and "good afternoon" are all phatic expressions. In phatic expressions, speech acts are not communicative, since no content is communicated. According to anthropologist Bronis?aw Malinowski, apparently "purposeless" speech acts--polite small talk, like "how are you?" or "have a nice day"--even though their content may be trivial or irrelevant to the situation, perform the important function of establishing, maintaining, and managing bonds of sociality between participants.
In Roman Jakobson's work, the 'phatic' function of language concerns the channel of communication; for instance, when one says "I can't hear you, you're breaking up" in the middle of a cell-phone conversation. This usage appears in research on online communities and micro-blogging.
The term phatic communion ('bonding by language') was coined by anthropologist Bronis?aw Malinowski in his essay "The Problem of Meaning in Primitive Languages", which appeared in 1923 as a supplementary contribution to The Meaning of Meaning by C. K. Ogden and I. A. Richards. The term "phatic" means "linguistic" (i.e. "by language") and comes from the Greek phatós ("spoken, that may be spoken"), from ? ph?mí ("I speak, say").
"You're welcome", in its phatic usage, is not intended to convey the message that the hearer is welcome; it is a phatic response to being thanked, which in turn is a phatic whose function is to acknowledge the receipt of a benefit.
Similarly, the question "how are you?" is usually an automatic component of a social encounter. Although there are times when "how are you?" is asked in a sincere, concerned manner and does in fact anticipate a detailed response regarding the respondent's present state, this needs to be pragmatically inferred from context and intonation.
Example: a simple, basic exchange between two acquaintances in a non-formal environment:
Neither speaker expects an actual answer to the question but rather it is an indication that each has recognized the other's presence and has therefore sufficiently performed that particular social duty.
In Japanese, phatic expressions play a significant role in communication, where they are referred to as "aizuchi."
Non-verbal phatic expressions are used in nonverbal communication for emphasis or to add detail to the message that a person conveys or expresses. Common examples of these are smiling, gesturing, waving, etc. According to Dr. Carola Surkamp, professor at University of Cologne, non-verbal phatic communication can be expressed with involuntary physical features such as direction of gaze, blushing, posture, etc. and that these have a vital function in regulating conversation.
Phatic expressions are used on different communication platforms on the internet such as social media networks where certain platforms require and prompt certain actions to be made between users to communicate or implicate certain messages between people without direct utterances. Examples for this would be: 'likes', comments/replies, shares/reblogs, emoji use, etc. These 'phatic posts' as Radovanovic and Ragnedda like to call them, are again used a social function of social communicative upkeep that has no real value but expresses social connection, relationships between users and recognition.