Bookdown.org - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
73% 
Page quality
89% 
Page structure
33% 
Link structure
61% 
Server
33% 
External factors
100% 
SEO Score
Response time
0.66 s
File size
37.40 kB
Words
2341
Media files
24
Number of links
31 internal / 71 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home | Bookdown
The page title is too short. (166 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
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
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 HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
generatorHugo 0.127.0
viewportwidth=device-width, initial-scale=1
langen-us
twitter:cardsummary
twitter:titlebookdown: Authoring Books and Technical Documents with R Markdown
twitter:descriptionThe platform bookdown.org is provided by RStudio for authors to publish books online for free. The bookdown package is an open-source R package that facilitates writing books and long-form articles/reports with R Markdown.
twitter:imagehttps://bookdown.org/yihui/bookdown/images/logo.png
og:imagehttps://bookdown.org/yihui/bookdown/images/logo.png
charsetutf-8

Test up to 1.000 webpages of bookdown.org with our free plan!

Try For Free
No trial. It's just free!

Page quality

Content
(Critically important)
This page contains 2341 words. That's ok.
40.4% of the text are stop words.
The page contains a listing, which indicates a good text layout.
26 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 19.2 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The following tag is repeated too often: bookdown
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)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/yihui/bookdown/images/logo.pngBookdownBookdown
/yihui/bookdown/images/logo.pngThe bookdown logo
/yihui/bookdown/images/cover.jpgbookdown: Authoring Books and Technical Documents with R Markdown
https://r.geocompx.org/images/cover.pngGeocomputation with R
...derndive.com/images/logos/book_cover.pngStatistical Inference via Data Science
https://r-graphics.org/cover.jpgR Graphics Cookbook, 2nd edition
/yihui/rmarkdown-cookbook/images/cover.pngR Markdown Cookbook
...tidytextmining.com/images/cover.pngText Mining with R
/yihui/rmarkdown/images/cover.pngR Markdown: The Definitive Guide
/yihui/blogdown/images/cover.pngblogdown: Creating Websites with R Markdown
/rdpeng/rprogdatascience/cover_sm.pngR Programming for Data Science
....github.io/efficientR/figures/f0_web.pngEfficient R programming
...k/bookdown-BeyondMLR/data/book_cover.jpgBeyond Multiple Linear Regression
...f88b36f94b80c7ea67cafe7c/7f70b/cover.pngAdvanced R
datascienceatthecommandline.com/og.pngData Science at the Command Line, 2e
...duction/data_science_live_book_cover.pngData Science Live Book
...ocviz.co/assets/dv-cover-executive-b.jpgData Visualization
...ing-shiny.org/img/engineering-shiny.jpegEngineering Production-Grade Shiny Apps
https://otexts.com/fpp2/fpp2_cover.jpgForecasting: Principles and Practice (2nd ed)
https://clauswilke.com/dataviz/cover.pngFundamentals of Data Visualization
...tudio-education.github.io/hopr/cover.pngHands-On Programming with R
...ckets/amazon/978036735/9780367357986.jpgIntroduction to Data Science
https://r4ds.had.co.nz/cover.pngR for Data Science
r-pkgs.org/images/cover-2e-small.pngR Packages (2e)

Page structure

H1 heading
(Critically important)
BOOKDOWN
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)
There are 46 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 BOOKDOWN
H1 bookdown: Authoring Books and Technical Documents with R Markdown
H1 Geocomputation with R
H1 Statistical Inference via Data Science
H1 R Graphics Cookbook, 2nd edition
H1 R Markdown Cookbook
H1 Text Mining with R
H1 R Markdown: The Definitive Guide
H1 blogdown: Creating Websites with R Markdown
H1 R Programming for Data Science
H1 Efficient R programming
H1 Beyond Multiple Linear Regression
H1 Advanced R
H1 Data Science at the Command Line, 2e
H1 Data Science Live Book
H1 Data Visualization
H1 Engineering Production-Grade Shiny Apps
H1 Forecasting: Principles and Practice (2nd ed)
H1 Fundamentals of Data Visualization
H1 Hands-On Programming with R
H1 Introduction to Data Science
H1 R for Data Science
H1 R Packages (2e)
H2 Write HTML, PDF, ePub, and Kindle books with R Markdown
H2 by Yihui Xie
H2 by Robin Lovelace, Jakub Nowosad, Jannes Muenchow
H2 by Chester Ismay and Albert Y. Kim
H2 by Winston Chang
H2 by Yihui Xie, Christophe Dervieux, Emily Riederer
H2 by Julia Silge and David Robinson
H2 by Yihui Xie, J. J. Allaire, Garrett Grolemund
H2 by Yihui Xie, Amber Thomas, Alison Presmanes Hill
H2 by Roger D. Peng
H2 by Colin Gillespie, Robin Lovelace
H2 by Paul Roback and Julie Legler
H2 by Hadley Wickham
H2 by Jeroen Janssens
H2 by Pablo Casas
H2 by Kieran Healy
H2 by Colin Fay, Sébastien Rochette, Vincent Guyader, Cervan Girard
H2 by otexts.com
H2 by Claus O. Wilke
H2 by Garrett Grolemund
H2 by Rafael A. Irizarry
H2 by Hadley Wickham and Garrett Grolemund
H2 by Hadley Wickham and Jennifer Bryan
Some anchor texts are used more than once.
2 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (71) on this page.

Found links on this page

LinkAttributesAnchor text
https://bookdown.org/home/IMG-ALT Bookdown
https://bookdown.org/home/Home
https://bookdown.org/home/about/About
/yihui/bookdown/Documentation
/home/archive/Books
https://bookdown.org/home/tags/Tags
/home/authors/Authors
/home/contest/Contest
http://bookdown.org/connect/Log in
https://github.com/rstudio/boo...External No Text
https://twitter.com/rstudioExternal No Text
/home/index.xmlNo Text
https://github.com/rstudio/boo...External open-source R package
/home/archive/archive
/yihui/bookdown/online book
/yihui/bookdown/New window bookdown: Authoring Books and Technical Documents with R Markdown
https://github.com/rstudio/boo...External Star
/yihui/bookdown/New window Text duplicate IMG-ALT bookdown: Authoring Books and Technical Documents with R Markdown
/yihui/bookdown/New window Read more →
A-TITLE Read More...
https://geocompr.robinlovelace...New window External Subdomain Geocomputation with R
https://github.com/geocompx/ge...External Text duplicate Star
https://geocompr.robinlovelace...New window External Subdomain Text duplicate IMG-ALT Geocomputation with R
https://geocompr.robinlovelace...New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://moderndive.com/New window External Statistical Inference via Data Science
https://github.com/moderndive/...External Text duplicate Star
https://moderndive.com/New window External Text duplicate IMG-ALT Statistical Inference via Data Science
https://moderndive.com/New window External Text duplicate Read more →
A-TITLE Read More...
https://r-graphics.org/New window External R Graphics Cookbook, 2nd edition
https://github.com/wch/rgcookbookExternal Text duplicate Star
https://r-graphics.org/New window External Text duplicate IMG-ALT R Graphics Cookbook, 2nd edition
https://r-graphics.org/New window External Text duplicate Read more →
A-TITLE Read More...
/yihui/rmarkdown-cookbook/New window R Markdown Cookbook
https://github.com/yihui/rmark...External Text duplicate Star
/yihui/rmarkdown-cookbook/New window Text duplicate IMG-ALT R Markdown Cookbook
/yihui/rmarkdown-cookbook/New window Text duplicate Read more →
A-TITLE Read More...
https://www.tidytextmining.com/New window External Subdomain Text Mining with R
https://github.com/dgrtwo/tidy...External Text duplicate Star
https://www.tidytextmining.com/New window External Subdomain Text duplicate IMG-ALT Text Mining with R
https://www.tidytextmining.com/New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
/yihui/rmarkdown/New window R Markdown: The Definitive Guide
https://github.com/rstudio/rma...External Text duplicate Star
/yihui/rmarkdown/New window Text duplicate IMG-ALT R Markdown: The Definitive Guide
/yihui/rmarkdown/New window Text duplicate Read more →
A-TITLE Read More...
/yihui/blogdown/New window blogdown: Creating Websites with R Markdown
https://github.com/rstudio/blo...External Text duplicate Star
/yihui/blogdown/New window Text duplicate IMG-ALT blogdown: Creating Websites with R Markdown
/yihui/blogdown/New window Text duplicate Read more →
A-TITLE Read More...
/rdpeng/rprogdatascience/New window R Programming for Data Science
https://github.com/rdpeng/rpro...External Text duplicate Star
/rdpeng/rprogdatascience/New window Text duplicate IMG-ALT R Programming for Data Science
/rdpeng/rprogdatascience/New window Text duplicate Read more →
A-TITLE Read More...
https://csgillespie.github.io/...New window External Subdomain Efficient R programming
https://github.com/csgillespie...External Text duplicate Star
https://csgillespie.github.io/...New window External Subdomain Text duplicate IMG-ALT Efficient R programming
https://csgillespie.github.io/...New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
/roback/bookdown-BeyondMLR/New window Beyond Multiple Linear Regression
https://github.com/proback/Bey...External Text duplicate Star
/roback/bookdown-BeyondMLR/New window Text duplicate IMG-ALT Beyond Multiple Linear Regression
/roback/bookdown-BeyondMLR/New window Text duplicate Read more →
A-TITLE Read More...
https://adv-r.hadley.nz/New window External Subdomain Advanced R
https://github.com/hadley/adv-rExternal Text duplicate Star
https://adv-r.hadley.nz/New window External Subdomain Text duplicate IMG-ALT Advanced R
https://adv-r.hadley.nz/New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://www.datascienceattheco...New window External Subdomain Data Science at the Command Line, 2e
https://github.com/jeroenjanss...External Text duplicate Star
https://www.datascienceattheco...New window External Subdomain Text duplicate IMG-ALT Data Science at the Command Line, 2e
https://www.datascienceattheco...New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://livebook.datasciencehe...New window External Subdomain Data Science Live Book
https://github.com/pablo14/dat...External Text duplicate Star
https://livebook.datasciencehe...New window External Subdomain Text duplicate IMG-ALT Data Science Live Book
https://livebook.datasciencehe...New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://socviz.co/New window External Data Visualization
https://socviz.co/New window External Text duplicate IMG-ALT Data Visualization
https://socviz.co/New window External Text duplicate Read more →
A-TITLE Read More...
https://engineering-shiny.org/New window External Engineering Production-Grade Shiny Apps
https://github.com/ThinkR-open...External Text duplicate Star
https://engineering-shiny.org/New window External Text duplicate IMG-ALT Engineering Production-Grade Shiny Apps
https://engineering-shiny.org/New window External Text duplicate Read more →
A-TITLE Read More...
https://otexts.com/fpp2/New window External Forecasting: Principles and Practice (2nd ed)
https://otexts.com/fpp2/New window External Text duplicate IMG-ALT Forecasting: Principles and Practice (2nd ed)
https://otexts.com/fpp2/New window External Text duplicate Read more →
A-TITLE Read More...
https://clauswilke.com/dataviz/New window External Fundamentals of Data Visualization
https://github.com/clauswilke/...External Text duplicate Star
https://clauswilke.com/dataviz/New window External Text duplicate IMG-ALT Fundamentals of Data Visualization
https://clauswilke.com/dataviz/New window External Text duplicate Read more →
A-TITLE Read More...
https://rstudio-education.gith...New window External Subdomain Hands-On Programming with R
https://github.com/rstudio-edu...External Text duplicate Star
https://rstudio-education.gith...New window External Subdomain Text duplicate IMG-ALT Hands-On Programming with R
https://rstudio-education.gith...New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://rafalab.github.io/dsbook/New window External Subdomain Introduction to Data Science
https://rafalab.github.io/dsbook/New window External Subdomain Text duplicate IMG-ALT Introduction to Data Science
https://rafalab.github.io/dsbook/New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://r4ds.had.co.nz/New window External Subdomain R for Data Science
https://r4ds.had.co.nz/New window External Subdomain Text duplicate IMG-ALT R for Data Science
https://r4ds.had.co.nz/New window External Subdomain Text duplicate Read more →
A-TITLE Read More...
https://r-pkgs.org/New window External R Packages (2e)
https://r-pkgs.org/New window External Text duplicate IMG-ALT R Packages (2e)
https://r-pkgs.org/New window External Text duplicate Read more →
A-TITLE Read More...
https://www.rstudio.com/External Subdomain RStudio, PBC
https://github.com/rstudio/boo...External No Text
https://twitter.com/rstudioExternal No Text
/home/index.xmlNo Text

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://bookdown.org/home/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time of 0.66 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (37 kB).

HTTP Response Header

NameValue
dateFri, 21 Jun 2024 10:06:16 GMT
content-typetext/html; charset=utf-8
content-length38315
set-cookie178 Characters
accept-rangesbytes
cache-controlmust-revalidate, no-cache, max-age=0
last-modifiedThu, 20 Jun 2024 12:41:33 GMT
serverPosit Connect v2023.07.0
x-content-type-optionsnosniff
x-correlation-idaf4579c4-c917-4347-b737-9bf3c9306b71
statuscode200
http_versionHTTP/2

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 55 referring domains.
This page has 83 backlinks.
This page has backlinks from 51 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Allow: /

Similar sites

Search preview

bookdown.org › home
Home | Bookdown

Most important keywords

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

KeywordResultRecheck
book82%Check
BOOKDOWN82%Check
bookdown package63%Check
Online Book60%Check
data46%Check
Markdown46%Check
science46%Check
Data Science46%Check
Cookbook46%Check
text46%Check
Show more keywords and terms

Test up to 1.000 webpages of bookdown.org with our free plan!

Try For Free
No trial. It's just free!

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions