Formal:
* Synopsis: This is a concise summary of the plot or content, often used for books, films, or plays.
* Abstract: Similar to a synopsis, but often used for academic papers or research projects.
* Summary: A general overview of the main points or features.
Informal:
* Logline: A short, catchy phrase that summarizes the plot or concept. Often used in screenwriting.
* Elevator pitch: A brief description of something, ideally short enough to deliver in an elevator ride.
* Description: A more general term for any detailed account of something.
* Teaser: A brief, enticing snippet intended to pique interest.
* Quote: A short extract, often from a review or other source, used to highlight positive aspects.
More specific:
* Back cover copy: The text on the back of a book.
* Marketing copy: Any text used for promoting a product or service.
* Press release: A formal announcement about a product, event, or company.
Ultimately, the best word to use will depend on the specific context and the intended tone.