Update doc for getId()

Author: cham11ng

README.md

@@ -146,7 +146,7 @@ app.use(store.initializeMiddleware());
 
 Check if the store has been initialized or not.
 
-- `@params {boolean}` - Returns either true or false.
+- `@returns {boolean}` - Returns either true or false.
 
 ```js
 if (store.isInitialized()) {
@@ -189,9 +189,10 @@ const foo = store.find('foo');
 
 ### getId()
 
-Gets the unique domain id created for the current context/scope.
+Gets the unique store id created for the current context/scope.
+Example: If used in express, it returns unique store id per request.
 
-- `@returns {string | undefined}` - Returns the unique domain id.
+- `@returns {string | undefined}` - Returns the unique store id.
 
 ```js
 const requestIdentifier = store.getId();