Summarizing long documents

When you finish, you can get a useful summary of a long document and check that it is faithful to the source.

Why summaries save time

Work often arrives as long documents: a contract renewal, a policy update, a report from another department. You do not always need every word. You need to know what it says, what is new, and what you have to do about it.

AI is good at compressing text into a shape you can scan. It does not get bored on page twenty. But a summary is only as good as the question you ask, and it is never a replacement for reading the parts that matter to your decision.

Tell the tool who the summary is for

A weak prompt is “Summarize this.” You get a bland paragraph that fits no one. A stronger prompt is: “Summarize this report for a store manager who has two minutes. Give the main point in one sentence, then five bullets, then any deadlines, then anything that will cost us time or money.”

Notice that the strong prompt names a reader and a format. You can also ask for a different cut of the same text: “Now list only the risks,” or “Now explain it to a new hire.” One document can produce several useful views.

Check the summary against the source

A summary can leave out something important or add something that is not in the text. To reduce this, ask the tool to quote the line it used for each key point: “For each bullet, include the exact sentence from the document that supports it.” Then spot-check a few.

Pay special attention to numbers, dates, names and words like “must,” “may” and “unless.” A single word can change the meaning of a rule. If a point matters for a decision, go to the original page and read it yourself.

Worked example: a new vacation policy

Imagine your company in Nairobi sends a long new leave policy. You paste the approved, non-confidential text into your company’s allowed tool and ask: “Summarize for an employee. What changed from before? What must I do, and by when? Quote the sentence for each point.”

You get five bullets and quotes. You check the date for requesting leave and find it matches. One bullet says leave can be carried over, but the quote says “with manager approval.” You fix that line in your own notes. The tool saved time, and your check kept you accurate.

Practice now

Choose a public article or a long, non-confidential document. Ask an AI tool for a summary for a specific reader, with a supporting quote for each point. Check three of the quotes in the original.
Ask the same tool for two different views of that document, such as risks only and then a plain-language explanation. Note which view you would actually use at work.

Use any AI assistant you have. Do not paste private, client or patient information into it.

Check yourself

1. What makes a summary request stronger?

2. How can you reduce the chance of a wrong summary?

3. Which details deserve the closest check?

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AI-drafted. Checked by an automated validator and a separate AI reviewer; a person has not read every lesson. Translations and tutor answers are AI-made. Found a mistake? Tell us. AI can be wrong. General information only, not professional advice. Not affiliated with any AI company named. Current University is not accredited.