Informative means providing useful knowledge or facts that help you understand something better. When a book about dinosaurs is informative, it teaches you real details about how they lived, what they ate, and why they disappeared. When a teacher gives an informative presentation, students walk away knowing more than they did before.

Something informative doesn't just entertain or tell a story (though it can do those things too). It gives you actual knowledge you can use or remember. A documentary about space exploration is informative because it explains how rockets work and what scientists have discovered. A museum sign explaining how ancient people made pottery is informative because it teaches you their techniques.

Notice that informative is different from interesting. A video might be interesting because it's funny or exciting, but if you don't learn anything from it, it's not informative. The best presentations, articles, and conversations manage to be both: they hold your attention while teaching you something valuable. When your science fair project is informative, visitors understand your experiment and what you discovered. When you give an informative speech, your audience learns facts they can remember and use.