# Data Subject A data subject is an individual whose [PII](/dictionary/pii.md) is processed by a company (who is a [Controller](/dictionary/data-controller.md) or [Processor](/dictionary/data-processor.md)). {% hint style="success" %} Example: *BestSkin has an app that helps users reach their optimum skin health.*\ \ *The user becomes a data subject when they download the app and provide their* [*PII*](/dictionary/pii.md) *and/or health data to BestSkin.* {% endhint %} --- # 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://docs.assenteo.com/dictionary/data-subject.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.