Question

what is the term for pieces of information or facts that the writer wants the reader to know? impressions, details, pacing, narrative

Answer 1

There are a few possible terms depending on context:

- If you mean a single factual item the author wants the reader to know: "detail," "fact," or simply "piece of information."
- In argument or exposition: "claim" or "premise."
- In fiction/screenwriting: "beat" or "story beat" for a discrete unit of action or information; a big one is a "plot point."
- For background or world-building material: "exposition."

So: use "detail" or "piece of information" in general; use "beat"/"story beat" for narrative-writing, and "claim"/"premise" for argumentative writing.