SEO, AEO, and GEO: the check almost every vibe-coded app fails isn't the one you'd guess
Across every real StackSecured scan run so far, the single most commonly missing item isn't a meta description or an alt tag — it's FAQ schema, the one piece of markup that lets an AI answer engine quote you directly. Here's what SEO, AEO, and GEO each actually check for, and the real numbers behind which ones AI-built apps skip.
Ranks you in Google and Bing. Depends on backlinks, content depth, and technical plumbing (sitemap, canonical tags, titles).
Gets you quoted directly in a featured snippet, AI Overview, or voice answer. Depends on content shaped as clean, extractable question-answer pairs.
Gets you cited by name inside a ChatGPT, Perplexity, or Gemini answer. Depends on structured, unambiguous signals about who you are.
What 141 real scans actually show
The average Visibility score across every scan StackSecured has run is 76.6 out of 100 — not a disaster, but not a passing grade either, and 23 apps scored under 50. The breakdown of what's actually missing is the interesting part:
Look at what dominates that list: six of the eight most common failures are GEO or AEO checks, not classic SEO. That's the opposite of most people's mental model — founders worry about meta titles and keyword density, while the thing actually keeping them out of AI-generated answers is a missing FAQ block or an unreachable /about page.
Why AI-assisted builds skip this specifically
The same mechanism covered elsewhere on this blog for security bugs applies here almost exactly. A prompt like “build a landing page for my SaaS” produces a landing page — headline, features, pricing, a signup button. It does not produce Organization schema, because nothing in that prompt asked for machine-readable entity data. It does not produce FAQ schema, because the AI wrote FAQ copy as plain paragraphs, not as markup a crawler can parse. The tool did exactly what was asked. Visibility infrastructure — as opposed to visibility content — is almost never explicitly requested, so it almost never appears.
Readable copy, a working page title, images with (sometimes) alt text if the framework defaults to it, basic on-page content a human visitor can read fine.
FAQ schema, Organization schema, a genuinely reachable /about and /privacy page, JSON-LD of any kind — the structured layer built for machines, not for the person reading the page.
Why this matters more in 2026 than it did a year ago
Independent research this year has tracked how much ground AI-mediated discovery has taken from traditional search. ChatGPT passed 900 million weekly active users in 2026, up from roughly 400 million the year before, and Google's own AI Mode surpassed 1 billion monthly active users as of May 2026. Traffic behavior is shifting with it: across roughly 68,000 tracked queries, users clicked through a normal result 15% of the time versus only 8% when an AI Overview answered the query directly on the page — meaning the answer, not the link, is increasingly the entire interaction. A 2026 survey found 96% of B2B companies are effectively invisible in AI-generated discovery altogether.
None of that makes classic SEO obsolete — sitemaps and canonical tags still matter. It means a second, separate layer of visibility now exists, with its own failure modes, and most vibe-coded apps have never been checked against it at all.
The 10 checks, one by one
Page Title
A clear, 50–60 character title tag. The oldest ranking signal there is, and still the first thing missing on a fast AI-assisted build.
Meta Description
The 120–160 character summary search engines show under your title. No effect on ranking directly, real effect on whether someone clicks.
Open Graph Tags
Controls how your link looks when pasted into Slack, X, or LinkedIn. Missing this means a blank gray box instead of a preview card.
H1 Heading
Exactly one clear H1 stating what the page is. Search engines and AI crawlers both use it as the single strongest "what is this page about" signal.
Image Alt Text
Descriptive text for every image. Search and accessibility both depend on it — AI engines can't "see" an image any better than a screen reader can.
Structured Data (JSON-LD)
Machine-readable markup describing what your product actually is, in a format built for machines to parse — not the plain-English copy on the page.
FAQ Schema
Marks up your existing FAQ content so an answer engine can lift a specific question and answer directly into a result, with attribution to you.
Organization Schema
Tells AI engines your business's name, entity type, and identity in structured form — the difference between being a known entity and an anonymous domain.
Trust Pages
A reachable About, Contact, and Privacy page. Both Google and AI engines use these to decide whether a domain is a real, accountable business.
Technical SEO
robots.txt, sitemap.xml, and canonical tags set correctly — the plumbing that lets any crawler, human-search or AI, find your other pages at all.
The fastest fixes
Start with the two that showed up most in real scans. FAQ schema takes minutes if you already have FAQ content on the page — wrap the existing questions and answers in FAQPage JSON-LD, matching the exact question text visible on the page. Organization schema is a single static block — name, URL, logo, and a link to your social profiles — that almost never needs to change once it's added. Both are copy-paste-sized fixes, not redesigns, and both were missing on roughly a fifth to a third of every app scanned so far.
Is your app missing any of these 10 checks?
StackSecured runs the full SEO / AEO / GEO visibility check alongside 43+ security and infrastructure engines, in the same free scan.
Run a free scanCommon questions
What's the actual difference between SEO, AEO, and GEO?
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SEO (search engine optimization) is about ranking in traditional Google/Bing results. AEO (answer engine optimization) is about being the source an engine quotes directly in a featured snippet, AI Overview, or voice answer — it requires structured, question-shaped content an engine can lift cleanly. GEO (generative engine optimization) is about being cited by name inside a generated answer from ChatGPT, Perplexity, Gemini, or Claude, which depends less on keywords and more on whether your site clearly, structurally states who you are and what you do. They overlap, but a site can do well on one and fail the other two — plenty of well-ranked sites are never once cited by an LLM.
Why does FAQ schema matter this much specifically?
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FAQ schema is structured markup that wraps a question and its answer in a format machines can extract without guessing. Answer and generative engines overwhelmingly pull from content already shaped as a clean question-answer pair — it's a far more reliable extraction target than a paragraph they have to summarize themselves. It's also the single most commonly missing check across every StackSecured scan to date, ahead of every classic SEO tag.
Can a page rank well in Google and still be invisible to ChatGPT or Perplexity?
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Yes, and this is the gap most vibe-coded apps fall into. Google ranking depends heavily on backlinks, content depth, and age — signals a new app doesn't have yet. AI engines weight structured clarity (schema, a stated entity, direct answers to specific questions) more heavily relative to authority signals, because they're trying to extract a fact or a citation, not rank a list of ten blue links. A brand-new app with clean schema can get cited by an LLM well before it ever ranks on page one of Google.
Do AI coding tools ever add this automatically?
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Rarely, and not by default. A prompt like "build a landing page for my app" produces a landing page — it doesn't produce FAQ schema, Organization schema, or a reachable /about and /privacy page, because nothing in that prompt asked for them. Same pattern as the security gaps covered elsewhere on this blog: the tool does exactly what it's asked, and visibility infrastructure is almost never explicitly asked for.
More reading: Vibe coding security statistics 2026 · All 53 scan engines explained · All guides