AI answer engines like ChatGPT, Perplexity, and Google AI Overviews don't rank ten blue links — they pick a small number of sources to quote and ignore everything else. That means small technical and editorial mistakes, the kind traditional SEO shrugs off, can erase you from AI answers entirely. Below are the ten mistakes we see most often in AEO (Answer Engine Optimization) audits. For each one: the symptom that tells you it's happening, why it costs you citations, and the fix.
1. Accidentally blocking AI crawlers
Symptom: your robots.txt file, firewall, or CDN bot protection blocks GPTBot, ClaudeBot, or PerplexityBot — usually because a security plugin or an old "block all bots" rule made the decision for you years ago.
Why it costs citations: a crawler that can't fetch your page can't quote it. This is the one mistake that makes every other fix irrelevant, and it's almost always unintentional.
Fix: open yoursite.com/robots.txt and look for Disallow rules aimed at GPTBot, ClaudeBot, PerplexityBot, or Bingbot. Then check your CDN's bot-management settings, which often challenge AI crawlers by default. Our guide to AI crawlers and robots.txt walks through exactly what to allow.
2. Burying the answer
Symptom: a page titled "How much does teeth whitening cost?" opens with three paragraphs about your practice's philosophy before a price appears.
Why it costs citations: answer engines extract passages, not pages. If the direct answer isn't near the top of the section, the model quotes a competitor whose page states it plainly in the first sentence.
Fix: answer the question in the first one or two sentences under each heading, then add context. Journalists call this the inverted pyramid; it works just as well for machines.
3. Schema markup that contradicts the visible page
Symptom: your structured data says the price is $99 while the page says $149, or your schema lists business hours the footer doesn't match.
Why it costs citations: schema (machine-readable labels for your content, defined at schema.org) is a trust signal. When it contradicts the visible text, engines can't tell which version is true, so they discount both — or worse, quote the stale one.
Fix: treat schema as a mirror of the page, never a separate document. Whenever visible copy changes, the markup changes in the same edit. See schema markup for AEO for how to audit yours.
4. Inconsistent business facts across the web
Symptom: your address, phone number, service list, or founding year differ between your site, your Google Business Profile, LinkedIn, and old directory listings.
Why it costs citations: language models assemble a picture of your business from many sources. Conflicting facts lower their confidence, and low confidence means the engine hedges, skips you, or invents a blended version of the truth.
Fix: decide on one canonical set of facts, publish it on your site, then sweep your external listings into agreement. Recheck quarterly — third-party sites drift.
5. Undated content
Symptom: your articles show no publish date and no "last updated" date, anywhere.
Why it costs citations: for anything time-sensitive — prices, regulations, product comparisons — engines prefer sources they can verify as current. An undated page reads as potentially ancient, and it usually loses to a dated one saying the same thing.
Fix: show a visible published date and an updated date on every substantive page, back them with dateModified in your schema, and only bump the date when you genuinely revise the content.
6. Content that only exists in JavaScript
Symptom: "View source" on your page shows a nearly empty shell, because the actual text is rendered in the browser by JavaScript.
Why it costs citations: unlike Google's main crawler, most AI crawlers don't execute JavaScript. They fetch the raw HTML, and if the raw HTML is empty, your site is effectively blank to them.
Fix: use server-side rendering, static generation, or prerendering so the full text is in the initial HTML. Test by fetching your page with curl or a browser extension that disables JavaScript. Details in JavaScript rendering and AI crawlers.
7. Keyword-shaped headings instead of questions
Symptom: headings like "Boston Plumbing Services Solutions" instead of "How much does a plumber cost in Boston?"
Why it costs citations: answer engines match real user questions to passages, and the heading is the strongest label a passage has. A keyword pile matches no question anyone actually asks.
Fix: rewrite each major heading as the specific question the section answers, in the words a customer would use. Your body copy usually needs almost no change.
8. Duplicating half-answers across pages
Symptom: the same topic is partially covered on five different pages — a service page, two blog posts, an FAQ, a location page — and none of them is complete.
Why it costs citations: an engine picks the single best passage on a topic. Five weak candidates split your authority and each loses to a competitor's one thorough page.
Fix: consolidate. Build one canonical page that fully answers the question, then link (or redirect) the fragments to it instead of letting them compete.
9. Ignoring Bing
Symptom: all your effort targets Google, and you've never opened Bing Webmaster Tools.
Why it costs citations: ChatGPT's web browsing and Microsoft Copilot lean heavily on Bing's index. If Bing hasn't indexed your pages, you're invisible to a large share of AI-generated answers no matter how well Google likes you.
Fix: verify your site in Bing Webmaster Tools, submit your sitemap, and fix anything it flags. It typically takes under an hour. We cover the full setup in Bing SEO for Copilot.
10. Treating AEO as a one-time project
Symptom: you fixed everything above six months ago and haven't checked since.
Why it costs citations: models retrain, new crawlers appear with new names, CDN vendors change their bot defaults, and competitors keep publishing. A citation you hold today can quietly disappear, and nothing notifies you.
Fix: re-run the checks above at least quarterly, and periodically ask the major engines your most valuable questions to see who gets cited. If you'd rather not do that by hand, our $19/month monitoring watches your AI visibility continuously.
Frequently asked questions
Which mistake should I fix first?
Crawler access (mistake 1) and JavaScript-only content (mistake 6). If engines can't read your pages, nothing else on this list matters. Both are usually diagnosable in under thirty minutes.
How many of these mistakes does a typical site have?
In our audits, most sites have three to five — almost never just one. They compound: a buried answer inside undated, keyword-headed content is far weaker than any single mistake suggests.
How long until fixes show up in AI answers?
It varies by engine. Answers that rely on live web search (Perplexity, ChatGPT browsing, AI Overviews) can reflect fixes within days to weeks of a recrawl; answers drawn from model training data change much more slowly. Nobody can honestly promise a timeline.
Is this different from regular SEO?
It overlaps but isn't the same. SEO optimizes for a ranked list of links; AEO optimizes for being quoted inside a generated answer. Solid SEO helps, but plenty of pages that rank well are never cited — see AEO vs SEO for the full comparison.
Not sure which mistakes your site is making?
You could work through this list by hand — or let us do it. Our free AEO audit checks your site against every failure mode above, from crawler access to schema contradictions, and shows you exactly what's blocking your citations. It takes a minute to request and costs nothing.