What type of narration involves a narrator who is not a character and tells the story of all characters at the same time?

The narration described in the question refers specifically to third-person omniscient narration. This type of narration features a narrator who is not a character in the story and has the ability to know and convey the thoughts, feelings, and experiences of all characters simultaneously. This allows the narrator to provide a detailed and comprehensive view of the story, presenting various perspectives and insights that enhance the reader's understanding of the characters and plot.

Third-person omniscient narration is particularly powerful because it facilitates a deeper connection between the reader and all characters, as the narrator can move fluidly through different viewpoints. This style enables the exploration of multiple storylines and character arcs without the limitations of a singular perspective.

In contrast, other types of narration, such as first-person or second-person, focus solely on the experiences of an individual character or address the reader directly, which does not provide the overarching viewpoint that third-person omniscient narration offers. In all, the clarity and depth provided by third-person omniscient narration affirm its role in effectively conveying a multifaceted narrative.