Undergraduate research means doing projects or experiments while you're in college. It's like playing scientist and getting to find out new things about the world around you. Instead of just listening to your teacher talk about science, you get to do it yourself!
Your teacher, who is also called a supervisor, will help you come up with a project idea and guide you through the process of doing the project. You might need to read some books or websites to learn more about your project or go out and collect data by looking at things or talking to people. Once you have your data, you will analyze it to see what it tells you, and then you can share your findings with other people by presenting at a conference or writing a report.
Undergraduate research is a great way to learn more about a subject you're interested in, get hands-on experience, and explore possible careers. It also helps you develop skills such as critical thinking, problem-solving, and communication, which are important in any job you might have in the future.