add more docs to readme

README.md

@@ -5,3 +5,16 @@
 GitHub Action to install ollama, pull a model and run the ollama server.
 
 Both the ollama install and the model are cached between runs.
+
+Example usage:
+
+```yaml
+      - uses: pydantic/ollama-action@v3
+        with:
+          model: qwen2:0.5b
+```
+
+We can then run tests and connect to `http://localhost:11434` to make requests to ollama. Here we use the [`qwen2:0.5b`](https://ollama.com/library/qwen2:0.5b) model as it's very small and therefore quick to download.
+
+This action is used by [`pydantic-ai`](https://github.com/pydantic/pydantic-ai).
+