A learner-centered syllabus can take many forms, but often includes shared decision-making, a rationale for course objectives and tips for staying on track.
Your syllabus can help you set the stage for a successful class. It can help you take students on a journey through your class. Where does the journey end (outcomes) and how are you going to get there? This is also a great opportunity to discuss shared responsibilities. What do you expect of your students and what should they expect of you? Making it learner-centered can help students better understand how to be successful in your course.