It helps with vocabulary. Reading such a story exposes you to new words. For instance, if the story is about a jungle adventure, you might learn words like 'safari' or 'jungle'.
It improves pronunciation. When you read the story aloud, you can practice the correct pronunciation of words. And you can imitate the intonation patterns in the story.
A first - class English story can also enhance your comprehension skills. As you follow the plot, understand the characters and their motives, you are training your brain to understand more complex English texts over time. The story might use different sentence structures and literary devices that you gradually get used to and understand better as you read more stories.