The word "because" is a conjunction that helps explain reasons or causes. When we say something like, "I went to the park because it was sunny," we are giving a reason for our action. It connects two ideas, showing how one leads to the other. Using "because" can make our sentences clearer and more informative. For example, if someone asks why Sarah is happy, you might say, "She is happy because she got a new puppy." This not only answers the question but also provides a specific reason that helps others understand the situation better.