In novels or short stories authors can't provide sing descriptions and character dialog and introduce the conflict with a great deal of contextual detail and background information also. Called blink

I believe the term you are referring to is "in medias res," which means starting in the middle of the action or narrative. In this technique, authors often provide minimal background information and allow the reader to piece together the story as it progresses instead of providing a lengthy exposition at the beginning. This approach is commonly found in literature, especially in works that aim to capture the reader's attention and maintain an element of suspense throughout. However, it should be noted that not all authors use this technique and some may choose to provide more context and background information upfront.