docs: Add what is what

docs/FAQ.md

@@ -4,6 +4,18 @@ sidebar: auto
 
 # FAQ
 
+## What is what
+
+[node-red-contrib-home-assistant-websocket](index.md) is a package that contains a set of nodes in Node-RED that interface with Home Assistant. It uses the Home Assistant WebSocket API to communicate with Home Assistant.
+
+[hass-node-red](https://github.com/zachowj/hass-node-red) is a Home Assistant custom [integration](https://www.home-assistant.io/docs/glossary/#integration). It extends the Home Assistant WebSocket API to allow Node-RED to do more with Home Assistant, such as creating sensors, buttons, and switches in Home Assistant from Node-RED. Typically, it is installed via [HACS](https://hacs.xyz/) but can be installed [manually](https://github.com/zachowj/hass-node-red?tab=readme-ov-file#manual).
+
+[Node-RED Home Assistant Community Add-on](https://github.com/hassio-addons/addon-node-red) is a Home Assistant [Add-on](https://www.home-assistant.io/docs/glossary/#add-on) that runs Node-RED with the [Home Assistant nodes](https://github.com/zachowj/node-red-contrib-home-assistant-websocket) pre-installed.
+
+[Node-RED](https://nodered.org) is a flow-based development tool for visual programming developed originally by IBM for wiring together hardware devices, APIs, and online services as part of the Internet of Things.
+
+[Home Assistant](https://www.home-assistant.io) is an open source home automation that puts local control and privacy first.
+
 ## Entities not showing in the autocomplete dropdown
 
 1. Make sure you have at least deployed once after adding a server config.