# Core Concepts - [Events](https://docs.growlytics.in/core-concepts-1/events.md): Every time an action happens that you wish to keep track of, you send an Event to Growlytics. Events can be as easy as choosing the text string that defines them. - [Sessions](https://docs.growlytics.in/core-concepts-1/sessions.md): User Sessions are series of events that are performed within a single visit or interaction with your application. - [User/Customer Profile](https://docs.growlytics.in/core-concepts-1/user-customer-profile.md): Growlytics creates a customer profile for each person who launches your app or visits your website. --- # 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.growlytics.in/core-concepts-1.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.