The document discusses the importance of assessment in libraries. It defines assessment as evaluating the importance, size, or value of operations in order to make data-driven decisions and improve customer service. A culture of assessment relies on analyzing facts and research to deliver optimal services. Reasons to assess include learning user needs, investigating new services, allocating resources, and accountability. Effective assessment requires leadership, customer-focused staff, and collecting meaningful data. The document also provides examples of assessment tools and positions such as the assessment librarian role.