TLDR: Summaries are concise overviews of content, enhancing readability and SEO. To write effective summaries: highlight key points, be clear and concise (3-5 sentences), use straightforward language, integrate keywords naturally, and match the content's tone. Avoid extra details, jargon, and ensure the summary stands alone. AI can assist but needs human review for clarity and accuracy.
https://yoast.com/how-to-write-an-effective-summary-for-your-content/