note about devtooling

step2-06/README.md

@@ -11,6 +11,26 @@ We also see how we may compose the reducers according to the shape.
 If you want a really neat UI to show what the store looks when actions are dispatched to the store, use this Chrome extension:
 https://chrome.google.com/webstore/detail/redux-devtools/lmhkpmbekcpmknklioeibfkpmmfibljd
 
+# Dispatch
+
+As long as there is a store reference, you can dispatch an action to trigger the middleware and reducers which in term changes the store which in turn will cause re-renders in the view.
+
+```ts
+store.dispatch(actions.addTodo('id0', 'hello world'));
+```
+
+> Note: It is important to note that dispatches in general have a "fire and forget" approach. We expect React to re-render the UI correct on its own accord. Rendering isn't necessarily synchronous in React!
+
+# `getState()`
+
+To examine the state of the store, you can call `getState()` to get the current snapshot of the state.
+
+```ts
+store.getState();
+```
+
+The Chrome / Firefox extension is a work of genius! It lets you replay actions and step backwards to debug the current state of Redux. In a large enough application, this kind of debuggability is invaluable! It also helps developers that are not immediately familiar with your application to quickly get a handle on how the state changes over some actions.
+
 # Exercise
 
 ## Visualize the state changes with Chrome extension