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An independent audit of gnu.org, measured by Adnave on November 12, 2026. We read 12 pages of the site as a search engine first receives them and ran 44 checks. Organic health is 80 out of 100. The site lets the main AI assistants read it.
Growth Navigator · gnu.org
11 opportunities to improve
12 pages read in full
Organic health
out of 100
Ads readiness
out of 100
Our suggested order: biggest obstacles first, quickest first among equals. The effect of each fix is not measured. 2 take minutes.
Step 1 · Organic
Everything here was observed on the site. Fixing it removes a known obstacle; no one can promise a specific ranking in return.
Observed · AdnaveBot's reading of 12 pages on 2026-11-12 · each finding is what we saw on those pages; “what to do”, the score and the order are our judgment
When someone shares the page, the preview will look bare or use the wrong image.
What to do: Add Open Graph tags: og:title, og:description and an og:image of 1200 × 630 pixels.
Paste inside the <head> of the page. Replace the image address with a picture of 1200 by 630 pixels.
<meta property="og:type" content="website"> <meta property="og:title" content="The GNU Operating System and the Free Software Movement"> <meta property="og:description" content="Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use."> <meta property="og:url" content="https://www.gnu.org/"> <meta property="og:image" content="https://www.gnu.org/your-preview-image.png"> <meta name="twitter:card" content="summary_large_image">
The page has no H1 heading, so search engines get no clear statement of its topic.
What to do: Add one H1 near the top that states the main topic in plain words.
How to fix this: How to write page titles and meta descriptionsThe http:// version of the site still answers on its own, so some visitors and links stay on an insecure copy.
What to do: Redirect every http:// address to its https:// equivalent with a permanent (301) redirect.
For an Apache server, add to the top of the .htaccess file. Many hosts also offer this as a switch called “Force HTTPS”.
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]There is no structured data, so an assistant has to guess what the business is from loose text.
What to do: Add schema.org markup for the organisation, plus the type that fits the page: Product, Service, Article, FAQPage or SoftwareApplication.
Paste inside the <head> of the page. Fill in the name and logo address.
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "gnu.org",
"url": "https://www.gnu.org",
"logo": "https://www.gnu.org/your-logo.png"
}
</script>Google will choose its own snippet for these pages, often a poor one.
What to do: Add a description of 70 to 160 characters to each page.
A single H1 tells search engines what each page is about.
What to do: Give each page exactly one H1 that states its topic.
Without it, copies of the page (with tracking codes, for example) can compete with each other in search.
What to do: Add a canonical link pointing at the page’s preferred address.
Paste inside the <head> of the page.
<link rel="canonical" href="https://www.gnu.org/">
Structured data lets Google show extras such as ratings, prices, opening hours and FAQs in your result.
What to do: Add schema.org markup that fits the business (Organization, LocalBusiness, Product, FAQ).
Paste inside the <head> of the page. Fill in the name and logo address.
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Organization",
"name": "gnu.org",
"url": "https://www.gnu.org",
"logo": "https://www.gnu.org/your-logo.png"
}
</script>Search engines and screen readers use a link's words to understand the page it leads to. “Learn more” tells them nothing.
What to do: Reword each link to name its destination, for example “See our pricing” instead of “Learn more”.
Links shared on X will show as plain text.
What to do: Add a twitter:card meta tag (summary_large_image works for most pages).
Paste inside the <head> of the page. Replace the image address with a picture of 1200 by 630 pixels.
<meta property="og:type" content="website"> <meta property="og:title" content="The GNU Operating System and the Free Software Movement"> <meta property="og:description" content="Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use."> <meta property="og:url" content="https://www.gnu.org/"> <meta property="og:image" content="https://www.gnu.org/your-preview-image.png"> <meta name="twitter:card" content="summary_large_image">
An optional plain-text summary of the site for AI assistants. It is cheap to add, but there is no evidence yet that it changes how often a site is cited.
What to do: Optionally add /llms.txt with a short description of the site and links to its most important pages.
Optional. Save as llms.txt at the top level of the site. Edit the first lines to describe what you do.
# The GNU Operating System and the Free Software Movement > Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use. ## Pages - [The GNU Operating System and the Free Software Movement](https://www.gnu.org/) - [About GNU - Free Software Foundation](https://www.gnu.org/gnu/gnu.html) - [Philosophy of the GNU Project - GNU Project - Free Software Foundation](https://www.gnu.org/philosophy/philosophy.html) - [Licenses - GNU Project - Free Software Foundation](https://www.gnu.org/licenses/licenses.html) - [Free Software and Education - GNU Project - Free Software Foundation](https://www.gnu.org/education/education.html)
“The GNU Operating System and the Free Software Movement”
“Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.”
Subheadings help readers and search engines scan the page.
The page gives search engines real content to work with.
Alt text helps image search and screen-reader users.
Visitors and search engines get a secure connection.
Nothing on the page blocks it from being indexed.
The page declares a mobile viewport.
Search engines and screen readers know which language to expect.
Search engines have instructions for crawling the site.
Search engines have a list of your pages.
Both forms end at www.gnu.org.
A made-up address correctly returns a 404, so search engines can drop dead pages.
Browsers are told to always use the secure connection and not to guess file types.
Images, scripts and styles all load over https.
That is quick.
A reasonable size for the page itself, before images.
Scripts are loaded without delaying what visitors see.
The server shrinks the page before sending it.
Width and height are set, so the page does not jump as images load.
Your icon appears in browser tabs and search results.
Nothing in robots.txt shuts out the crawlers behind ChatGPT, Claude, Perplexity or Gemini.
Headings phrased as questions, each followed by an answer, are easy for assistants to quote.
Every internal link we followed loads.
Checked 4 other pages.
Checked 4 other pages.
Checked 4 other pages.
Checked 4 other pages.
Checked 4 other pages.
| Page | Response | Time | Words |
|---|---|---|---|
The GNU Operating System and the Free Software Movement https://www.gnu.org/ | 200 | 0.07s | 1,089 |
About GNU - Free Software Foundation https://www.gnu.org/gnu/gnu.html | 200 | 0.05s | 701 |
Philosophy of the GNU Project - GNU Project - Free Software Foundation https://www.gnu.org/philosophy/philosophy.html | 200 | 0.05s | 540 |
Licenses - GNU Project - Free Software Foundation https://www.gnu.org/licenses/licenses.html | 200 | 0.03s | 2,313 |
Free Software and Education - GNU Project - Free Software Foundation https://www.gnu.org/education/education.html | 200 | 0.04s | 679 |
(no title) https://www.gnu.org/software/software.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/distros/distros.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/doc/doc.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/proprietary/proprietary.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/help/help.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/audio-video/audio-video.html | no answer | 0.00s | 0 |
(no title) https://www.gnu.org/graphics/graphics.html | no answer | 0.00s | 0 |
Step 2 · Ads
Ads only pay off when the site can measure what they bring in. We look for tracking tags in the page code; tags that load later, through a consent banner or tag manager, will not show up here.
Without analytics you cannot see where visitors come from or what they do.
What to do: Set up Google Analytics 4 and add its tag to every page.
How to fix this: What to set up before you spend on adsGoogle Ads cannot learn which clicks turn into customers without it.
What to do: Create a conversion action in Google Ads and add the tag, or import conversions from Analytics.
How to fix this: What to set up before you spend on adsFacebook and Instagram ads need the Pixel to track sales and build audiences.
What to do: Create a Pixel in Meta Events Manager and add it to every page.
How to fix this: What to set up before you spend on adsTikTok ads need the Pixel to measure results and optimize delivery.
What to do: Create a Pixel in TikTok Ads Manager and add it to every page.
How to fix this: What to set up before you spend on adsAudit run on . It reads up to 12 pages (60 with a free account) as a search engine first receives them and checks further internal links for errors. Scores are a weighted share of the checks passed.
Run the same audit on your own site, free. No sign-up needed.
This page reports only what our audit observed on public pages of gnu.org. Adnave is not affiliated with it. If you run this site and something here is wrong, run a fresh audit and tell us.