Google Search Advocate John Mueller offered technical SEO feedback on a two-day, vibe-coded Bento Grid Generator, flagging issues that could limit discoverability. He responded in a Reddit thread after the developer launched the project on Product Hunt.
What Mueller flagged
- Key homepage content sits outside the HTML in a file named llms.txt loaded by JavaScript. Google does not use llms.txt, and Mueller is unaware of other search engines using it. Place explanatory content directly in HTML, for example with a visible, dismissible banner.
- Only the title and meta description are needed for this site. Keywords, author, and robots meta tags provide no SEO benefit here.
- Hreflang tags are unnecessary when the site has only one language.
- The site's JSON-LD is unsupported by Google. Refer to Google's list of supported structured data types.
- Hidden h1 and h2 elements are ineffective. Make headings visible to users.
- The robots.txt includes unnecessary directives.
- Skip a sitemap for a single-page site.
- Add the domain to Google Search Console.
- Clarify on the homepage what the app does.
Expectations
Mueller cautioned against expecting quick wins from these fixes. The updates primarily help search engines understand the site.
"Will you automatically get tons of traffic... No, definitely not."
Background
Mueller is a Google Search Advocate who shares technical guidance in public forums and references official documentation. Google documents which structured data types are supported in Search and provides Search Console for verified site owners to monitor indexing and visibility.
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