Skip to content
https://mayoclinic.com

Content

· 5 checks — Internal links, mixed-content guards, Open Graph previews, and structured data rolled into one auditable list.
SCORE
74
GRADE
C
FIX
3
REVIEW
1
PASS
1
INFO
0
Checks
5
1 PASS 1 REVIEW 3 FIX
D
Structured Data
Action
3 JSON-LD block(s) found — issues found that may affect search visibility.
FIX
3 JSON-LD block(s) found — issues found that may affect search visibility.
Warning::
Missing or invalid @context in block #2
The @context should be "https://schema.org" for search engines to recognize the data.
Expected: https://schema.org
Warning::
Missing @type in block #2
Search engines need @type to understand the structured data.
Warning::
Missing required property "itemListElement" for BreadcrumbList
The "itemListElement" property is required for the BreadcrumbList schema type.
Info::
Custom type "WebPage" — unable to validate specific properties
Info::
3 JSON-LD blocks found

The @context should be "https://schema.org" for search engines to recognize the data.

Expected: https://schema.org
Why this matters

JSON-LD without @context is invalid structured data — Google ignores the entire block.

Learn more ▾

@context must be 'https://schema.org' (or the schema-specific URL). Without it, the block isn't parseable as schema.org JSON-LD and Google skips it. Most schema generators handle this; manual edits sometimes drop the field.

Source: JSON-LD spec / schema.org

Search engines need @type to understand the structured data.

Why this matters

JSON-LD without @type is invalid — Google can't determine which schema to validate against.

Learn more ▾

Every JSON-LD block must declare @type (Article, Product, Organization, etc.). Without it, the block is structurally valid JSON but not valid schema.org. Add @type matching the content (e.g., '@type': 'Article' for blog posts).

Source: schema.org / Google Search Central

The "itemListElement" property is required for the BreadcrumbList schema type.

Why this matters

Schema markup missing required properties is silently rejected by Google — your structured data appears in source but never as a rich result.

Learn more ▾

Each schema.org type has required properties (Article needs headline + author + datePublished; Product needs name + offers; etc.). Missing them means Google's rich-result eligibility check fails. The Search Console Rich Results Test surfaces specific gaps. Fix the missing property; rich results re-appear within hours.

Source: Google Search Central / schema.org

JSON-LD Blocks

Block 1 : WebPage
5 properties Valid
{
  "datePublished": "",
  "@type": "WebPage",
  "name": "The world's best hospital",
  "@context": "https://schema.org",
  "url": "https://www.mayoclinic.org"
}
Block 2
0 properties Valid
Missing or invalid @context
{}
Block 3 : BreadcrumbList
2 properties Valid
Missing required property: itemListElement
{
  "@type": "BreadcrumbList",
  "@context": "https://schema.org"
}
D
Brand Presence
Action
Site-name consistency, favicon, social image, meta tags, schema, and contact signals
FIX

Brand Presence

Partial brand coverage — a few channels are missing brand signals.

D

49/100

Site name appears as

Page titleMayo Clinic
og:site_nameMayo Clinic
twitter:site—
Organization.name—

Consistent

Brand assets

Favicon

12/15

covers apple-touch-icon

Social share image

14/20

og:image set; twitter:image missing

Meta completeness

8/20

Organization schema

0/15

Contact info discoverable

5/10

contact page

Findings

  • Missing brand name in: twitter:site, Organization.name
  • Add twitter:image — Twitter falls back to og:image only when it's larger than 300×157
  • Add an apple-touch-icon and at least two PNG sizes (32x32 + 192x192)
  • twitter:card missing
  • No Organization schema — Google can't render your logo in the knowledge panel
  • Only partial contact info discoverable — consider adding a dedicated contact page or mailto/tel link

How consistently your brand appears across channels — shared link previews, structured data, favicon, contact info.

C
Open Graph
Action
Open Graph tags are partially configured — some improvements recommended.
REVIEW
Open Graph tags are partially configured — some improvements recommended.
Critical::
og:image is not reachable
The og:image URL could not be fetched. Social platforms won't be able to display it.
Got: https://www.mayoclinic.org/-/media/Web/GBS/Shared/Images/SocialMedia-Metadata/MC_TwitterCard_120x120.jpg
Warning::
Missing og:description
The og:description tag controls the description in social sharing previews.
Info::
Missing twitter:card
Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.
URL: https://www.mayoclinic.org/-/media/Web/GBS/Shared/Images/SocialMedia-Metadata/MC_TwitterCard_120x120.jpg

The og:image URL could not be fetched. Social platforms won't be able to display it.

Why this matters

An unreachable og:image URL (404, DNS fail, slow timeout) means social platforms cache the failure and serve no image for hours.

Learn more ▾

Social platforms (Facebook, Twitter) cache OG metadata aggressively — including failed image fetches. A momentarily-broken og:image can leave your shares imageless for hours. Test og:image URLs in Facebook's Sharing Debugger to force re-cache after fixing.

Source: Open Graph Protocol / Facebook Sharing Debugger

The og:description tag controls the description in social sharing previews.

Why this matters

No og:description means social cards either show no subtitle or scrape the first paragraph — usually unflattering.

Learn more ▾

Without og:description, social platforms either render no subtitle or pull whatever text appears first on the page. The first paragraph is rarely written for share-card context. A purpose-written 150-200 character og:description gives a polished card.

Source: Open Graph Protocol

Without twitter:card, Twitter falls back to Open Graph tags. Adding it gives you more control.

Why this matters

Without twitter:card, Twitter renders posts as plain text — no preview image, no structured layout.

Learn more ▾

Twitter requires `<meta name="twitter:card" content="summary_large_image">` (or summary) to render share-cards at all. Without it, links appear as raw text and engagement plummets vs cards. Twitter also falls back to og:image if twitter:image isn't set, so configure both.

Source: Twitter Developer Platform

Preview

mayoclinic.com

The world's best hospital

No description

Preview quality · Twitter/X D · 50/100
  • twitter:card — Add <meta name="twitter:card" content="summary_large_image">
  • twitter:title — falling back from og:title
  • twitter:description — falling back from <meta name=description>
  • twitter:image — falling back from og:image

  • twitter:card is missing

    → Add <meta name="twitter:card" content="summary_large_image">

MAYOCLINIC.COM

The world's best hospital

No description

Preview quality · Facebook A+ · 95/100
  • og:title — The world's best hospital
  • og:description — falling back from <meta name=description>
  • og:image — https://www.mayoclinic.org/-/media/Web/GBS/Shared/Images/SocialMedia-Metadata/MC_TwitterCard_120x120.jpg
  • og:type — article
  • og:url — https://www.mayoclinic.org
  • og:site_name — Mayo Clinic

The world's best hospital

mayoclinic.com

Preview quality · LinkedIn A+ · 95/100
  • og:title — The world's best hospital
  • og:description — falling back from <meta name=description>
  • og:image — https://www.mayoclinic.org/-/media/Web/GBS/Shared/Images/SocialMedia-Metadata/MC_TwitterCard_120x120.jpg

mayoclinic.com

The world's best hospital

No description

Preview quality · Slack A+ · 95/100
  • og:title — The world's best hospital
  • og:description — falling back from <meta name=description>
  • og:image — https://www.mayoclinic.org/-/media/Web/GBS/Shared/Images/SocialMedia-Metadata/MC_TwitterCard_120x120.jpg

Social preview quality

Averaged across Twitter/X, Facebook, LinkedIn, and Slack.

B · 83/100
FieldTwitter/XFacebookLinkedInSlack
og:title
og:description⚠⚠⚠
og:image
og:type
og:url
og:site_name
twitter:card———
twitter:title⚠———
twitter:description⚠———
twitter:image⚠———
A+
Mixed Content
No mixed content detected — all resources use HTTPS.
PASS
No mixed content detected — all resources use HTTPS.
Info::
No mixed content detected — all resources use HTTPS
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback