How can previewing a selection before it is read help you as a reader?

Previewing a selection can help you as a reader by giving you an overview of the content, allowing you to understand the main ideas, structure, and key points before diving into the details. This can help you focus on what is important while reading and make connections between different parts of the text more effectively. Additionally, previewing can help activate your prior knowledge and set a purpose for reading, enhancing your comprehension and retention of the material.