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

# Deploy

> Environments, publishing, merging and traffic splits: how a change reaches real users, and the chat widget it reaches them through.

| Term                                                                      | What it is                                                                                                      |
| ------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| **[Environment](/documentation/deploy/environments/overview)**            | One draft-and-published copy of the agent. Main, plus up to nine more.                                          |
| **[Publishing](/documentation/deploy/environments/publishing)**           | Promoting an environment's draft to its published version, which is the copy live traffic reaches.              |
| **[Merging](/documentation/deploy/environments/merging)**                 | Folding work done in one environment back into another.                                                         |
| **[Traffic split](/documentation/deploy/environments/traffic-split)**     | Sending a share of live conversations to a different environment, to compare two versions against real traffic. |
| **[Chat widget](/documentation/deploy/widget/embedding-the-chat-widget)** | The embeddable chat surface. Always "chat widget"; older material says "Webchat".                               |