10.3: Types of Informative Speeches

Informing & Engaging your Audience

Informative speeches help audiences learn about a topic in a clear and engaging way. These speeches fall into four main categories: definitional, descriptive, explanatory, and demonstration. In definitional speeches, speakers explain the meaning of complex or abstract ideas. For example, a student might give a speech titled "What Is Artificial Intelligence?" and define how machine learning works in apps like ChatGPT or Spotify. A well-crafted definitional speech breaks down confusing terms, offers comparisons, and connects the topic to real-world applications. To make the concept relevant, the speaker might show how AI is already used in things like social media feeds and fraud protection (Lumen, 2023).

Descriptive speeches paint a picture with words, helping the audience imagine a person, place, event, or object. Imagine a speech called "Inside a SpaceX Rocket Launch," where the speaker vividly describes the roar of engines, the sterile smell of the launch bay, and the towering spacecraft. Descriptive speeches like this engage the senses and emotions. A speaker might also describe a popular music festival like Coachella, discussing the visuals, sounds, and crowds to help the audience feel like they’re actually there. These speeches succeed when they use vivid language and sensory detail to create a mental image (Osborn & Osborn, 1991).

Explanatory speeches focus on clarifying how or why something happens. These are useful for explaining systems, events, or changes. A strong example would be a speech on "How Social Media Algorithms Shape Your News Feed," showing how platforms like TikTok or Instagram recommend content based on user behavior. Another could explore why the student loan crisis has grown in the U.S. by examining changes in tuition costs, wage stagnation, and policy decisions (Looney & Yannelis, 2015). These speeches help the audience make sense of larger issues by explaining their causes, history, and consequences.

Finally, demonstration speeches show the audience how to do something step-by-step. These are often the most interactive. A student might give a speech called "How to Practice Self Defense," including tips on body position, fist formation, and breath control. Another speech could be "How to Register to Vote Online," guiding the audience through the process with live screen sharing or props. These speeches are useful because they teach real-world skills that people can apply immediately (Lumen, 2023). Effective demonstration speeches are carefully planned, use clear visuals, and often involve the audience to keep them engaged and informed.

 

Example 10.3.1

Real-World Example: Fast Fashion in Everyday Life

A student wants to inform their classmates about fast fashion, the trend of making and buying cheap clothing quickly. Here’s how they use each type of informative speech to do it in a way that’s simple, useful, and engaging:

1. Definitional Speech - "What is Fast Fashion?"

The speaker explains what fast fashion means: trendy clothes made quickly and cheaply, often copied from runway shows. They define key terms like “throwaway culture” and explain why clothes are so cheap at stores like Shein or H&M. They might say, “Fast fashion is like fast food—easy to get, but not always good for you or the world.”

2. Descriptive Speech - "A Look Inside a Fast Fashion Factory"

The speaker describes what it’s like in a real factory that makes fast fashion clothes. They talk about the loud machines, the crowded rooms, and the long hours workers put in. One story could be about a worker sewing hundreds of shirts a day for just a few dollars. This helps the audience picture the human side of the clothes they wear.

3. Explanatory Speech - "Why Fast Fashion Hurts the Planet"

The speaker explains how fast fashion leads to pollution. They break down how dye from clothes can poison rivers or how piles of clothing waste end up in landfills. They might show how one cotton t-shirt takes 700 gallons of water to make. This helps the audience connect their shopping habits to real-world effects.

4. Demonstration Speech - "How to Upcycle an Old T-Shirt" 

The speaker demonstrates step-by-step how to turn an old T-shirt into a reusable tote bag by cutting off the sleeves, tying the bottom, and creating a simple, no-sew bag. The audience leaves with both an awareness of clothing waste and a practical skill to give clothes a second life.

 

Each version helps the audience learn something useful, see a clear picture, or try something new. And that’s what informative speaking is all about - making people smarter in ways they can use right now.

 Key Takeaways:

• Informative speeches teach, not persuade.
  They are designed to help the audience understand new concepts, see vivid images in their mind, or learn how to do something step by step.

• There are four main types of informative speeches.
  Definitional (what something means), Descriptive (what something looks/sounds/feels like), Explanatory (how or why something happens), and Demonstration (how to do something).

• Real-world examples and sensory details make speeches powerful.
  Whether describing a SpaceX launch or explaining how to register to vote, using relevant, concrete examples connects the content to the audience’s daily lives.

---

 

Exercises

• "What Type Is It?" Activity (Small Groups)
  Give each group a speech topic (e.g., “How ChatGPT works,” “The Coachella Festival,” “Recycling Myths,” “Making Ramen in a Microwave”). Ask them to identify what type of informative speech it would be and explain why.

• Quick Outline Builder (Individual)
  Students choose a familiar topic (e.g., favorite comfort foods, popular video games, how dogs communicate) and write a 3-point outline for one type of informative speech (e.g., Demonstration: “How to Create a Playlist on Spotify”).

• Mini Speech Spring (Pairs)
  In pairs, students pick a simple topic and give a 1-minute mini informative speech to each other, using one of the four types. Then, they give quick feedback: “Was it clear, engaging, and informative?”