Société Electrique de l'Our (SEO)

What Dr Urls found on seo.lu

From the audit of their public home page on 20/10/2026, worst first. Each links to what it means and how it is fixed.

• medium
  Duplicate ID attributes found

  Duplicate IDs cause label elements, aria-labelledby, aria-describedby, and fragment link targets to associate with the wrong element.

• medium
  Images missing width and height attributes

  Missing image dimensions are the leading cause of Cumulative Layout Shift (CLS), a Core Web Vital and ranking factor.

• medium
  Open Graph og:image tag missing

  Social media posts with images receive significantly more engagement than text-only posts.

• medium
  Render-blocking CSS or JavaScript

  Render-blocking resources directly impact First Contentful Paint (FCP) and Largest Contentful Paint (LCP), both Core Web Vitals metrics.

• medium
  Scripts without async or defer

  Synchronous scripts halt HTML parsing while the browser downloads and executes them.

• medium
  Thin content (too few words)

  Google's Helpful Content system explicitly targets thin, low-value pages.

• low
  ETag header missing on resources

  Without ETags, browsers cannot efficiently validate whether cached resources have changed.

• low
  Excessive inline CSS

  Inline CSS cannot be cached separately by the browser, so it is re-downloaded with every page load.

• low
  Link is named for screen readers but has no anchor text

  Nothing is broken for users.

• low
  Social media preview is incomplete

  Incomplete social previews reduce the visual appeal and click-through rate of shared links.

• low
  Twitter image meta tag missing

  Tweets with images receive significantly more engagement than text-only tweets.

• low
  X-Content-Type-Options header missing

  Without this header, browsers may interpret files as a different content type than intended, which can lead to XSS attacks when a malicious file is interpreted as executable scrip…

7 security findings are not listed on this public page; the site's owner sees them in a full audit after claiming it.