Agile is an approach to project management that emphasizes on sprints. Let's say you are developing a note-taking application. Instead, of building the entire application at once, you divide it into smaller versions. You start with a basic version of your app that allows users to write/take notes. After releasing this version to users and gathering their feedback, you make changes or add new features based on user suggestions. With each version released, you continue to gather feedback and implement new ideas. This cycle of taking feedback and implementing changes is called a sprint. With each sprint, you improve your application. And this is how agile makes your project management easy and efficient.