G-vo.org - SEO Checker

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Overview of the SEO Check
Meta information
68% 
Page quality
38% 
Page structure
14% 
Link structure
93% 
Server
45% 
External factors
100% 
SEO Score
Response time
0.04 s
File size
10.70 kB
Words
158
Media files
5
Number of links
15 internal / 10 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
GAVO HomePage
The page title is too short. (164 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Server location: United States of America
The language is not specified in the HTML markup.
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (ISO-8859-1;) is set correctly.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
robotsindex,follow
Content-Style-Typetext/css

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Page quality

Content
(Critically important)
There are only 158 words on this page. Use at least 250 words to provide useful information.
Some words from the page title are not used within the pages content
31% of the text are stop words.
The page contains a listing, which indicates a good text layout.
3 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 15 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
No Apple touch icon is specified.
This page does not require any JavaScript files.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
1 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
The HTTPS protocol for secure data transmission is not used.

Media list

URLAlt attributeTitle
/pmwiki/uploads/Main/ivoa_logo_b1.gifNo alt attribute provided
...iki/uploads/Main/GAVO-D-stars-new-ss.jpg[GAVO text on German map and sky background]
.../uploads/Main/mix-DataCenter2-M31-s2.jpg[Screenshots of GAVO Data Center applications]
...uploads/Main/mix-tutorials-desat-ss2.jpg[Tutorials]
/pmwiki/uploads/Main/mix-highlights.jpg[Mix of pictures from main GAVO services]

Page structure

H1 heading
(Critically important)
Home
The H1 heading contains the words Home! Use important keywords instead.
The H1 heading consists of only one word. There should be more information given.
The H1 heading is too short (4 characters). It should be at least 20 Characters long.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 Home
H2 About GAVO
H2 Getting Started
H2 GAVO Services
H2 Publications
H2 GAVO's blog
H2 Contact
H6 About GAVO Duplicate text
H6 GAVO Services & Data Center
H6 Getting Started Duplicate text
H6 Highlights
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 10 external links on this page.

Found links on this page

LinkAttributesAnchor text
/pmwiki/Main/HomePageSubdomain Home
/pmwiki/About/AboutSubdomain About GAVO
/pmwiki/About/GettingStartedSubdomain Getting Started
/pmwiki/About/ServicesSubdomain GAVO Services
/pmwiki/About/PublicationsSubdomain Publications
https://blog.g-vo.org/New window External Subdomain GAVO's blog
/pmwiki/About/ImpressumSubdomain Contact
/pmwiki/Internal/InternalSubdomain Internal
/pmwiki/Main/HomePage?action=l...Subdomain Login
http://www.ivoa.net/New window External Subdomain No Text
/www/About/AboutSubdomain Text duplicate About GAVO
/www/About/Impressumcontact us
/www/About/ServicesText duplicate GAVO Services
http://vo.uni-hd.de/External Subdomain Data Center
/www/About/Servicesservice
http://vo.uni-hd.de/External Subdomain GAVO Data Center
http://dc.zah.uni-heidelberg.d...External Subdomain WIRR
/www/About/GettingStartedText duplicate Getting Started
/pmwiki/About/PublishYourDataSubdomain Publishing your data in the VO
http://www.ivoa.net/newsletter...New window External Subdomain IVOA Newsletter
http://dc.g-vo.org/New window External Subdomain Heidelberg data center
http://gavo.mpa-garching.mpg.d...New window External Subdomain Virgo-Millennium
http://www.cosmosim.org/External Subdomain CosmoSim
http://creativecommons.org/pub...External Creative Commons CC0
/www/About/ImpressumSubdomain Impressum / Contact

Server configuration

HTTP redirects
(Critically important)
The checked page does not redirect to another URL.
HTTP header
(Important)
The used PHP version is outdated and may be a security risk.
The web server version is sent within the HTTP header.
The X-powered header is sent within the response header. (unnecessary)
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.04 seconds.
This page only loads 1 CSS files. That's ok.
This page does not require any JavaScript files.
The file size of the HTML document is fine (11 kB).

HTTP Response Header

NameValue
dateTue, 12 Nov 2024 02:33:46 GMT
serverApache/2.4.62 (Debian)
varyUpgrade-Insecure-Requests,Accept-Encoding
x-powered-byPHP/5.6.30-0+deb8u1
set-cookie96 Characters
expiresTue, 01 Jan 2002 00:00:00 GMT
cache-controlno-cache
x-frame-optionsSAMEORIGIN
content-security-policyframe-ancestors 'self'; base-uri 'self'; object-src 'none';
x-xss-protection1; mode=block
last-modifiedTue, 12 Nov 2024 02:33:46 GMT
content-encodinggzip
content-length3653
content-typetext/html; charset=ISO-8859-1;
statuscode200
http_versionHTTP/1.1

External factors

This website has excellent links from other websites.
This page has backlinks from 417 referring domains.
This page has 452,854 backlinks.
This page has backlinks from 220 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

Disallow: /pmwiki/uploads/Internal
Disallow: /www/uploads/Internal

Similar sites

Search preview

g-vo.org
GAVO HomePage

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
GAVO55%Check
Page46%Check
Services44%Check
Getting Started43%Check
Data42%Check
Center42%Check
Data Center42%Check
Highlights40%Check
Contact38%Check
Publications38%Check
Show more keywords and terms

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