# Key Concepts Institutions use the Unizin Order Tool to manage and scale their digital content programs. By accessing the Unizin content marketplace, Institutions offer their faculty, instructors, and students highly affordable digital content. There are several key concepts that drive the use of the Order Tool at your institution: * [User Profiles](/products/content/unizin-order-tool/key-concepts/profiles.md). The Unizin Order Tool supports different users and workflows. * [Ordering periods](/products/content/unizin-order-tool/key-concepts/ordering-periods.md). Ordering periods define when users may order content for a given term. * [Coordinator permissions](/products/content/unizin-order-tool/key-concepts/coordinator-permissions.md). Granular permissions enable institutions to flexibly allow centralized and staff-based ordering workflows. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://resources.unizin.org/products/content/unizin-order-tool/key-concepts.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.