> For the complete documentation index, see [llms.txt](https://docs.coherence.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherence.io/0.9/overview.md).

# Overview

- [What is coherence?](https://docs.coherence.io/0.9/overview/what-is-coherence.md)
- [How does coherence work?](https://docs.coherence.io/0.9/overview/how-does-coherence-work.md)
- [Features and Roadmap](https://docs.coherence.io/0.9/overview/roadmap.md)
- [Rooms and Worlds](https://docs.coherence.io/0.9/overview/rooms-and-worlds.md): coherence provides two types of online replication services: Rooms and Worlds. Read about the different uses cases for each
- [Requirements](https://docs.coherence.io/0.9/overview/requirements.md)
- [Release Notes](https://docs.coherence.io/0.9/overview/release-notes.md): Read about new features, important changes and fixes for version 0.9