The USCIS Policy Manual is the agency’s central online resource, replacing older policy documents like the Adjudicator’s Field Manual. It covers various immigration topics, including citizenship, naturalization, and visa processes, and is organized into volumes, parts, and chapters. The manual ensures transparency, consistency, and efficiency, offering the latest policy updates, a keyword search function, and links to key resources. While it provides guidance to USCIS officers, it doesn’t remove their discretion in decision-making or create enforceable legal rights for individuals.