Communicative act

Any verbal or non-verbal behavior through which one party intentionally or unintentionally transfers information to others is a communicative act. For example, a father may point at an object while helping his daughter clean her room to convey to the child that the object must be put away [APA Dictionary of Psychology].
Simply speaking, a “communicative act” is the action that a speaker realizes by producing an utterance. Communicative acts involve phenomena such as requests, invitations, apologies, greetings, and others. The linguistic encoding and decoding of a communicative act are closely related to both (a) the interactants present when the act is communicated and (b) the context in which they find themselves [Casillas, p. 1].
A communicative act is the essential item of communication understood as a functionally integral element, the core of which is a text (a monologue, a dialogue, or a polylogue). In each communicative act, four components are distinguished and, therefore, four aspects [Dotsevych, p. 33]:
 the extra-linguistic aspect;
 the semantic aspect;
 the cognitive aspect;
 the proper linguistic aspect.

Sources:

⠀ Casillas M., Hilbrink E. (2022). Communicative act development. Developmental and Clinical Pragmatics. Berlin/Boston: De Gruyter Mouton.

⠀ Dotsevych T., Tkach T., Slabouch V. (2020). Phenomenon of “communicative act”: A psycholinguistics perspective. Humanities and Social Sciences. Berlin: Springer nature.