When speaking informally, people sometimes use “air quotes” to signal direct quotations—this is a recommended technique in public speaking.

Air quotes are a visual cue that speakers use to indicate that they are quoting someone else's words or that they are referencing a term or concept in a specific, often ironic or sarcastic, way. This technique can be particularly effective in public speaking for several reasons:

1. Clarity: Air quotes help distinguish the speaker's original thoughts from those being quoted. This can clarify who is being referenced and whether the speaker is endorsing or critiquing the quoted material.

2. Engagement: Using air quotes can draw the audience's attention and emphasize particular phrases or ideas, making the speech more lively and engaging.

3. Tone: Air quotes can convey tone, especially when the speaker is using humor or irony. They can provide a visual representation of sarcasm or skepticism, enhancing the emotional nuance of the message.

4. Memory Aid: The physical gesture of air quoting can help the speaker remember the flow of their speech and keep the audience engaged, as it adds a dynamic element to the presentation.

Overall, while air quotes should be used judiciously and in appropriate contexts, they can enrich public speaking by enhancing clarity, engagement, and tone.