How to write an answer capsule AI engines can extract

You have probably already asked an assistant how to get quoted in AI answers, and it probably told you to write clear, well-structured content. True, and useless. Every page you compete with is also clear and well-structured.

Here is the part that is more specific and more checkable. There is a physical shape that a quotable answer takes on a page, and there is public data on how often that shape shows up on pages that actually got cited.

What the audit found, stated carefully

In September, Search Engine Land contributor Adam Gnuse audited 15 domains across ecommerce, cybersecurity and tech, healthcare, data analytics, education, and local business. Together those sites produced nearly 2 million organic monthly sessions and 7,500 direct referral sessions from ChatGPT. He pulled the blog landing pages that received ChatGPT referral sessions and reviewed each one by hand.

Across the full dataset, 72.4% of cited blog posts included an identifiable answer capsule. Over half, 52.2%, featured either original data or a branded owned insight. The strongest configuration was both together, at 34.3% of cited posts. Only 13.2% of cited posts had neither.

Among the capsules on those cited posts, roughly 91% contained no links at all. About 5.2% carried internal links only, about 3.5% external only, and under 1% both.

Now the part most write-ups skip. This is an observational audit of pages that were already cited. It reports what cited pages tended to have. There is no control group of uncited posts, so there is no base rate to compare against: we do not know what share of the same sites' uncited posts also carried a capsule. The audit does not publish a post count either, only the 15 domains behind it. It does not run a controlled test where the same page is cited more often after a capsule is added. Cited pages correlate with capsules. Read every number above as co-occurrence.

That is still worth acting on, because the cost of acting is a paragraph.

What a capsule actually is

The term is not standardized, so the audit set its own working parameters: a concise, self-contained explanation of roughly 120 to 150 characters, about 20 to 25 words, placed directly after a title or after an H2 that is framed as a question.

Two ranges are useful in practice, and only one of them comes from the study.

The section capsule is the one above: 20 to 25 words, sitting under a question-framed H2, answering that one question.

The page-level quick answer is longer, 40 to 80 words, sitting under the H1, answering the question the whole page exists to answer. That range is our convention, not a finding from the audit. We use it because a page-level question usually needs a definition, a mechanism, and a limit, and three sentences is where that lands without padding. The answer block at the top of this guide is one.

Both are the same object doing the same job: a block of text that stays true after someone cuts it out of the page.

Do the task

1. Give the capsule a question to sit under

A capsule with no question above it is just a first paragraph. The heading is what tells a parser what this block is an answer to.

Write the H2 the way a person asks it out loud. "How long should an answer capsule be" beats "Capsule length considerations." Then answer it in the very next line.

The heading work in general is covered in optimize headings for AI. The capsule is what goes underneath.

2. Kill the wind-up

Most first paragraphs spend their first sentence announcing that an answer is coming. "There are a few things to consider when deciding how long your answer should be." That sentence is extractable and says nothing.

Sentence one is the answer. Everything else in the block supports it.

3. One fact per sentence

This is the rule that does the most work and gets ignored the most.

Write for the case where a machine takes one sentence and drops it into an answer next to two competitors. Each sentence has to be complete and true standing alone.

That means splitting compound sentences that hide two claims, and it means not letting sentence three depend on a clause in sentence two. "It supports both formats, which is why the second one matters more" is a sentence that means nothing on its own. Say what it is.

4. Make the block survive being cut out

Read the capsule as though the rest of the page does not exist, because for the machine lifting it, it does not.

Every "this", "that", "the above", and "as mentioned" is a pointer into text that will not travel with the block. Replace them with the actual noun. The prose gets slightly more repetitive and considerably more portable.

Same rule for anything the block silently assumes: the product name, the year, the unit. If a stranger reading only those 25 words could misread them, an engine can too.

5. Take the links out

This is the counterintuitive one, and it is the finding with the cleanest number behind it: about 91% of capsules on cited posts had no links.

The author's reading is that a link-free block reads as a standalone unit of knowledge, while a link implies the real answer lives on another page. That interpretation is his, not a measured mechanism.

The practical move costs nothing either way. Keep every link you were going to add. Put them in the paragraph below the capsule, where they still do their job for the reader and for internal linking.

6. Add something only you can say

The second-strongest pattern in the audit was original or owned data: a survey result, a benchmark, a proprietary metric, a finding framed explicitly as yours. Capsule plus original data was the strongest configuration in the dataset at 34.3% of cited posts.

You do not need a research budget for this. A number from your own operations, a range you see across your own customers, a specific observation from your own work all qualify. What does not qualify is restating a common recommendation and calling it yours.

7. Check that it is in the served HTML

A capsule that renders after script runs is a capsule some crawlers never see. View source and search for the first eight words of the block. If they are not in the response, the capsule does not exist for the purpose it was written.

The broader version of that check is in structure a page for AI answers and make your page machine-readable.

Old way versus new way

The old way opened a post with a hook: a scene, a statistic, a bit of tension, then the answer somewhere around paragraph four. That structure was built for a reader who had already clicked and needed a reason to stay.

The new way keeps the hook and moves the answer above it. The capsule sits under the heading, then the piece opens properly underneath. You are writing for two readers with opposite preferences, and the capsule is the cheapest way to serve both: the person scrolls past it, the machine stops there.

The damaging admission

A capsule does not get your page cited, and we will not tell you otherwise. The audit shows cited pages tend to have capsules. Turning that into "add a capsule and get cited" is a claim the data does not support, and we are not making it.

A capsule also cannot rescue a page with nothing specific in it. All you have done is make the thinnest 25 words on the page the easiest to extract. If the honest capsule for a page is generic, the problem is the page.

And this is not a one-time job. Capsules go stale the way prices do. A capsule written around a number that changed is now a confidently phrased wrong answer, sitting in the most quotable position on the page.

Check what an engine can actually lift

Write the question, answer it in the first line, hold to one fact per sentence, cut the links, and confirm the block is in the served HTML.

Run a free scan to see how ChatGPT, Perplexity, Gemini, and Claude read your key pages today, including whether there is an extractable answer near the top. The scan diagnoses any site. Automated apply through the connected Citedon plugin is WordPress only, and rewriting a first paragraph is something you can do yourself on any platform in five minutes.