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

> A Turn is a series of [Messages](/core-resources/message) and [Annotations](/core-resources/annotation) that are relevant to the Turn.

# Turn

Turns are distinct breaks between messages in a [Thread](/core-resources/thread). Turns contain a user message and any LLM response(s) to that user message.

[Annotations](/core-resources/annotation) at the Turn level apply to group of [Messages](/core-resources/message) in that turn. For example, the annotation for message preference is at the turn level.