docs.joomla.org/Using_The_Meta_Description

The meta description tag allows you to provide a summary of the content on the page in one paragraph. The tag can be used by search engines to display a description of the page when displaying it in search engine result pages (SERPs).

www.html-5.com/metatags/

List of HTML 5 Meta Tags

www.bing.com/webmaster/help/keyword-research-tool-628070b5

Explains the Keyword Research Tool which allows you to get data on organic keyword volumes and expand your keyword ideas.

www.link-assistant.com/seo-stop-words.html

Stop Words List is a comprehensive list of words that many search engines ignore when you include them into your search request.

www.joomlashine.com/blog/mobile-friendliness-as-ranking-fact...

SEO-Expert Chris Wagner writes about Googles coming mobile update on the 21st of April, 2015. Not on mobile yet? Want some tips? Here you go!

www.practicalecommerce.com/articles/87253-SEO-Mobilegeddon-I...

Google’s “mobile-friendly” algorithm update, dubbed “Mobilegeddon” by the search engine community, began rolling out Tuesday, April 21. Here’s what that means and what to do about it.

www.business2community.com/seo/official-google-ranks-mobile-...

As the rate of people using mobile devices to browse the Internet grows, Google has been making changes to their mobile search experience so that it better suits the needs of mobile users. On February 26th Google they took that experience to a whole ne ...

developer.chrome.com/devtools/docs/network

The Network panel records information about each network operation in your application, including detailed timing data, HTTP request and response headers, cookies, WebSocket data, and more. The Network panel helps you answer questions about the network ...

searchnewscentral.com/20130807459/General-SEO/10-on-page-opt...

Discover 10 proven onpage optimization strategies that actually work post-panda.

moz.com/blog/visual-guide-to-keyword-targeting-onpage-optimi...

As the "O" in SEO has broadened in scope, the most effective elements of on-page optimization have changed. While there is arguably no "perfectly optimized page," this update to a 2009 post provides a comprehensive guide to steer you in the right direc ...

joomquery.com/web-page-layout-factors-relevant-to-seo/

Several factors influence the position of a site in the search results. They can be divided into external and internal ranking factors. Internal ranking factors are those that are controlled by seo aware website owners (text, layout, etc.) and will be ...

www.sensational-seo.com/on-page-criteria.html

The SenSEO rules try to follow the Google Webmaster Guidelines. Furthermore there were lots of other trustful sources analyzed.

www.seobook.com/robots-txt-vs-rel-nofollow-vs-meta-robots-no...

This is a table of the three type of Nofollow compared against each other

stackoverflow.com/questions/14196801/sitemap-url-in-robots-t...

This thread tells you how to references your sitemap in the robots.txt

tools.seobook.com/robots-txt/

Generate effective robots.txt files that help ensure Google and other search engines are crawling and indexing your site properly.

www.askapache.com/seo/seo-with-robotstxt.html

Very nice tutorial dealing with the robots.txt file. Shows examples for google and other search engines. Wordpress robots.txt and phpBB robots.txt sample files.

humanstxt.org

An initiative to know the creators of the website. Contains the information about humans to the web building.

magazine.joomla.org/issues/issue-aug-2014/item/2233-rich-sni...

This article will take a closer look at the problems and solutions related to Microdata and RDFa and why a simple problem isn't so simple.

www.googleguide.com/advanced_operators.html

This is the Search operators section. Google Guide is an online interactive tutorial and reference for experienced users, novices, and everyone in between.

backlinko.com/google-ranking-factors

A list of all 200 Google ranking factors. Here you'll learn the ranking signals that search engines use to rank pages and sites.