A good story has a protagonist, goals, and opposition. Opposition includes obstacles and forces of nature, but typically opposition also takes the form of a character. Sometimes the opposition is another protagonist, leaving the audience to choose who they want to root for, but many stories include at least one villain, a character that is definitively “wrong”. Villains can be narrative or mechanical.
Background information is a tricky aspect of storytelling. Background information is one or more details that don’t seem relevant or important in the moment, but as the story progresses audiences work to collect and combine the different pieces of background information, gradually developing a greater understanding of who a character is.
All stories take place in a fictional world, also known as the diegetic world. The diegetic world is every location shown in the story and every location implied by the story. Part of good storytelling is establishing where the story takes place. The more the diegetic world resembles the world of the reader, the easier it is to establish the world for the reader.
Most character perspectives are revealed as part of the overall process of revealing character, see 103 on engaging and revealing characters, but POV characters have the added challenge of conveying the details of the story while also remaining true to their own perspective.
In addition to choosing a POV character, there is also the question of which voice to use; first, second, third limited, or third omniscient, and whether the story will be told in past or present tense. At the moment past first and third limited are most common within fiction.