Persuasive speaking relies on what Aristotle called the three appeals: ethos, or credibility; pathos, or emotional connection; and logos, or logical reasoning. Balancing all three produces the most convincing results, since audiences want to trust the speaker, feel something, and see sound evidence. Persuasive speeches often follow Monroe's Motivated Sequence to lead listeners step by step from attention to action, while informative speeches focus on clarity, accuracy, and audience comprehension without trying to change beliefs.
Visual aids such as slides, charts, or props clarify complex ideas and increase retention, but they must be simple and purposeful. The popular 10-20-30 rule for slide decks recommends no more than ten slides, a maximum of twenty minutes of presentation, and a minimum thirty-point font. Slides should support the speech, never replace it, so speakers avoid the common trap of reading directly from the screen. Beyond slides, modern speakers increasingly deliver talks online, where eye-level camera placement, good lighting, stable internet, chat polls, and slightly slower pacing help maintain engagement in the virtual format.
Several specialized contexts deserve attention. TED Talks, for instance, are known for packaging one big idea with strong storytelling, vivid visuals, novelty, and a clear call to action, all within roughly eighteen minutes. Storytelling more generally humanizes any message, making it more memorable through a simple beginning-middle-end structure and vivid detail. Humor, when used sparingly and appropriately, relaxes the audience, builds rapport, and makes points stick, though jokes must be self-deprecating, relevant, and timed carefully for the punchline. Throughout all of these contexts, speakers must consider cultural differences, since norms around eye contact, gestures, and humor vary widely across audiences and can change how a message is received.