1) Speech acts are utterances that perform actions rather than just communicating information, such as apologizing, promising, or naming a ship.
2) Austin categorized speech acts as locutionary (the act of communication), illocutionary (the message or action conveyed), or perlocutionary (the effect on the listener).
3) Searle identified five categories of speech acts: representatives that commit the speaker to a belief, directives that try to get the listener to do something, commissives that commit the speaker to an action, expressives that express the speaker's attitude, and declarations that change the status quo through the utterance.