The lecture method has several merits, including:
Efficient: Lectures can deliver a lot of information in a short amount of time. This is especially useful for courses with a lot of material.
Consistent: The lecture method is relatively unaffected by changes in class size or room configuration.
Scalable: A single teacher can address a large number of students at the same time.
Good for introducing new subjects: Lectures are good for introducing new subjects or focusing on a content area.
Can present new material: Lectures can present material that is not yet available in print or books.
Helps students develop listening skills: The lecture method can help students develop their listening skills.