Pragmatics is a relatively young branch of linguistics and it’s the study of how more meaning gets conveyed than with just the words spoken. It’s the study of secret or hidden meanings, if you like. But my favourite definition of pragmatics is it’s the study of how we don’t say what we mean.
And that’s often true. We’ll say one thing when we mean another. Here’s a video where we look at how we make indirect requests. We look at some common ambiguous English phrases and explore the social benefits that ambiguity can bring.