Point of view is the angle in which an author chooses to narrator and tell a story.
The story is told through a limited omniscient narrator. The narrator is all-knowing and all-seeing, but only through Louise. The reader is able to see the way Louise interacts with other characters, but is also able to see her thoughts. The reader sees Louise's life, but she is not telling the story making the narrator an omniscient one. With this point of view the reader is able to get an in depth look at the way Louise us thinking. This way you can see the way she is truly feeling, instead of just thinking of her as a sad widowed woman.
The omniscient narrator tells the story of Louise's hour of new found freedom. This happiness only last for an hour before her husband returns home and it it is found that he is in fact not dead. Ironically, Louise ends up dying at this moment.