docs: Update queries.md (#1134)

Author: cseas

docs/src/pages/guides/queries.md

@@ -5,7 +5,7 @@ title: Queries
 
 ## Query Basics
 
-A query is a declarative dependency on an asynchronous source of data that is tied to a **unique key**
+A query is a declarative dependency on an asynchronous source of data that is tied to a **unique key**. A query can be used with any Promise based method (including GET and POST methods) to fetch data from a server. If your method modifies data on the server, we recommend using [Mutations](https://react-query.tanstack.com/docs/guides/mutations) instead.
 
 To subscribe to a query in your components or custom hooks, call the `useQuery` hook with at least: