I think linguists have a specific name for the things that people say, where it doesn't carry literal meaning per se but rather in the act of saying it. "Good

I think linguists have a specific name for the things that people say, where it doesn't carry literal meaning per se but rather in the act of saying it. "Good morning!" What does that mean? Is it a good morning, this? Am I now compelled to have a good morning? Are you telling me about your good morning? Maybe, but it also conveys friendliness or politeness and or other things.