Sdss3.org - SEO Checker

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Overview of the SEO Check
Meta information
55% 
Page quality
80% 
Page structure
74% 
Link structure
93% 
Server
90% 
External factors
100% 
SEO Score
Response time
0.24 s
File size
11.20 kB
Words
545
Media files
18
Number of links
42 internal / 21 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
SDSS-III
The page title is too short. (80 pixels of 580 max pixel length) Optimize title
The page title is only one word.
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 (UTF-8) is set correctly.
Doctype
(Nice to have)
The Doctype markup is not in the first line of your HTML document. There must be no white spaces before the doctype markup.
The doctype XHTML 1.1 is set correctly.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
Content-Typetext/html; charset=UTF-8

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Page quality

Content
(Critically important)
These Typos were found:
  • availble => available
This page contains 545 words. That's ok.
26.8% of the text are stop words.
The page contains a listing, which indicates a good text layout.
8 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 19.95 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 loads 7 JavaScript files. This may affect the load time negatively.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 11 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
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
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
https://www.sdss3.org/images/offsite.png[EXT]
/images/home/dr10_galaxy_thumb.jpgThe Milky Way, showing availble SDSS-III APOGEE spectra
https://www.sdss3.org/images/home/boss.pngBOSS
/images/home/segue2.pngSEGUE-2
/images/home/apogee.pngAPOGEE
/images/home/marvels.pngMARVELS
/images/home/logo_sloan.jpgSloan Foundation
/images/home/logo_nsf.jpgNational Science Foundation
/images/home/logo_energy.jpgDepartment of Energy

Page structure

H1 heading
(Critically important)
SDSS-III
The H1 heading consists of only one word. There should be more information given.
The H1 heading is too short (8 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 SDSS-III
H2 SDSS-III Surveys
H2 The SDSS-III Collaboration
H3 The Data Release 10 Image
H3 Latest News from our Science Blog
H3 SDSS-III Server Status
Baselink: https://www.sdss3.org/
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are 21 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.sdss3.org/sitemap.phpSite Map
https://www.sdss3.org/index.phpHome
https://www.sdss3.org/surveys/Surveys
https://www.sdss3.org/science/Results
/instruments/Instruments
http://www.sdss.org/data/External Subdomain Data Releases
https://www.sdss3.org/dr18/DR18
https://www.sdss3.org/dr17/DR17
https://www.sdss3.org/dr16/DR16
https://www.sdss3.org/dr15/DR15
https://www.sdss3.org/dr14/DR14
http://www.sdss.org/dr13/External Subdomain DR13
IMG-ALT [EXT]
http://www.sdss.org/dr12/External Subdomain DR12
IMG-ALT [EXT]
http://www.sdss.org/dr11/External Subdomain DR11
IMG-ALT [EXT]
https://www.sdss3.org/dr10/DR10
https://www.sdss3.org/dr9/DR9
https://www.sdss3.org/dr8/DR8
http://classic.sdss.org/dr7/External Subdomain DR7
IMG-ALT [EXT]
http://classic.sdss.org/dr6/External Subdomain DR6
IMG-ALT [EXT]
http://classic.sdss.org/dr5/External Subdomain DR5
IMG-ALT [EXT]
http://classic.sdss.org/dr4/External Subdomain DR4
IMG-ALT [EXT]
http://classic.sdss.org/dr3/External Subdomain DR3
IMG-ALT [EXT]
http://classic.sdss.org/dr2/External Subdomain DR2
IMG-ALT [EXT]
http://classic.sdss.org/dr1/External Subdomain DR1
IMG-ALT [EXT]
https://www.sdss3.org/education/Education
/collaboration/Collaboration
https://www.sdss3.org/future/Future
https://www.sdss3.org/contact.phpContact
https://www.sdss3.org/SDSS-III Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy and Extrasolar Planetary Systems www.sdss3.org
/surveys/boss.phpBOSS Understanding Our Universe through Baryon Acoustic Oscillations www.sdss3.org/surveys/boss.php
/surveys/segue2.phpSEGUE-2 Mapping the Milky Way www.sdss3.org/surveys/segue2.php
/surveys/apogee.phpAPOGEE Probing the evolution of the Milky Way www.sdss3.org/surveys/apogee.php
/surveys/marvels.phpMARVELS Finding and Characterizing Extrasolar Planetary Systems www.sdss3.org/surveys/marvels.php
https://www.sdss3.org/Anchor SDSS-III
https://www.sdss3.org/Anchor BOSS
https://www.sdss3.org/Anchor SEGUE-2
https://www.sdss3.org/Anchor APOGEE
https://www.sdss3.org/Anchor MARVELS
/images/home/dr10_galaxy.jpgIMG-ALT The Milky Way, showing availble SDSS-III APOGEE spectra
A-TITLE Click for a larger image.
http://blog.sdss3.org/External Subdomain Science Blog
https://twitter.com/sdss3statusExternal Tweets by @sdss3status
http://www.sdss.org/External Subdomain Sloan Digital Sky Survey (SDSS)
https://www.sdss3.org/dr12/Data Release 12
/surveys/marvels.phpMulti-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS)
/surveys/apogee.phpAPO Galactic Evolution Experiment (APOGEE)
/surveys/boss.phpText duplicate BOSS
http://skyserver.sdss.org/publ...External Subdomain browse through sky images
http://skyserver.sdss.org/publ...External Subdomain data for individual objects
http://skyserver.sdss.org/publ...External Subdomain search for objects
https://www.sdss3.org/dr10/Data Release 10
https://www.sdss3.org/dr9/Data Release 9
https://www.sdss3.org/dr8/Data Release 8
http://classic.sdss.org/External Subdomain classic.sdss.org
/instruments/telescope.phpSloan Foundation 2.5-meter Telescope
/surveys/boss.phpText duplicate IMG-ALT BOSS
/surveys/segue2.phpText duplicate IMG-ALT SEGUE-2
/surveys/apogee.phpText duplicate IMG-ALT APOGEE
/surveys/marvels.phpText duplicate IMG-ALT MARVELS
/collaboration/SDSS-III Collaboration
/collaboration/description.pdfProject Description
http://www.sloan.org/External Subdomain IMG-ALT Sloan Foundation
http://www.nsf.gov/External Subdomain IMG-ALT National Science Foundation
http://www.energy.gov/External Subdomain IMG-ALT Department of Energy

Server configuration

HTTP redirects
(Critically important)
The checked page does not redirect to another URL.
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
This page loads 7 JavaScript files. This may affect the load time negatively.
The page response time is excellent with 0.24 seconds.
This page only loads 2 CSS files. That's ok.
The file size of the HTML document is fine (11 kB).

HTTP Response Header

NameValue
connectionclose
content-length4076
content-encodinggzip
content-typetext/html; charset=UTF-8
servernginx
x-pantheon-styx-hostnamestyx-fe4-b-6bffd6fd94-tfmhc
x-styx-req-idbc260d30-c019-11ef-9976-2a60f1b421ad
dateSun, 22 Dec 2024 04:03:43 GMT
x-served-bycache-chi-klot8100166-CHI, cache-fra-eddf8230092-FRA
x-cacheMISS, MISS
x-cache-hits0, 0
x-timerS1734840223.449164,VS0,VE125
varyAccept-Encoding, Cookie, Cookie
age0
accept-rangesbytes
via1.1 varnish, 1.1 varnish
statuscode200
http_versionHTTP/1.1

External factors

This website has excellent links from other websites.
This page has backlinks from 1,383 referring domains.
This page has 95,352 backlinks.
This page has backlinks from 665 different ip addresses.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

User-agent: *
Disallow: /internal/
Disallow: /mailman/
Disallow: /svn/
Disallow: /science/firefighters.php

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sdss3.org
SDSS-III

Most important keywords

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

KeywordResultRecheck
SDSS-III65%Check
SDSS-III Collaboration50%Check
org46%Check
sdss346%Check
Science40%Check
Image40%Check
Data Release 1039%Check
Data38%Check
Surveys38%Check
Collaboration38%Check
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