> ## Documentation Index
> Fetch the complete documentation index at: https://docs.streampixel.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Core concepts

> How the SDK boots, what it returns, and the session lifecycle.

The three foundations everything else builds on.

|                                                                                   |                                                                       |
| --------------------------------------------------------------------------------- | --------------------------------------------------------------------- |
| [Initialization & configuration](/resources/web-sdk/core-concepts/initialization) | How `StreamPixelApplication` boots a stream and every config option.  |
| [Return values](/resources/web-sdk/core-concepts/return-values)                   | What the SDK hands back — `pixelStreaming`, `UIControl`, and friends. |
| [Connection lifecycle](/resources/web-sdk/core-concepts/connection-lifecycle)     | States a session moves through, from connecting to streaming.         |