Docs: Switch.mdx (#23142)

* Add "When to use" info to Switch.mdx

* Update Switch.mdx

packages/grafana-ui/src/components/Forms/Switch.mdx

@@ -5,7 +5,12 @@ import { Switch } from "./Switch";
 
 # Switch
 
-Used to represent binary values
+### When to use
+
+`Switch` is a representation of an on-off state – like a light switch. So you can use `Switch` to toggle binary states.
+
+Switches trigger changes immediately. If your component should trigger a change only after sending a form, it's better to use either `RadioButtonGroup` or `Checkbox` instead. Furthermore, switches cannot be grouped – each `Switch` triggers an independent state. If you want multiple mutually exclusive choices, the `RadioButtonGroup` is the better option. To offer multiple choices within the same group or context which are not mutually exclusive, use `Checkbox` instead.
+
 
 ### Usage