SEO Lexicon


This is a Linux configuration file for your Apache web server. This is the file that will help your web server to build up traffic with Http. Very important for the optimization of urls in SEO.

301 redirect:

The 301 redirect is an error code indicating that content has been transferred from one url to another. We find this case especially during site migration. Allows search engines to adapt the indexing of your content when the error is detected. This prevents the search engine from scanning the old url, which is now empty for rating you.

404 error:

When a url is requested but it does not exist, has been deleted or modified, the error code 404 is activated. It is interesting to build your personalized 404 page for a quality user experience.


These are the links to your site from outside (other website, social networks …).


The baseline is the slogan that accompanies the name of your site. It is often displayed next to the logo in the navigation menu. It is an element offering short and simple information on the activity of the site.

Deep link:

All links that point to something other than the home page of the site.

Doorway page:

These are pages that are intended to automatically redirect the Internet user to other content. This is often used as the primary page of a multi-site.


After a page has been crawled by search engines, it is then indexed. That is, it will be classified and sorted according to its content.

Internal link density:

This is the numerical value of your site’s internal link density.


Analysis value corresponding to the online search frequency divided by the number of available results.

Keyphrase density:

It is an indicator that corresponds to the rate of occurrence of a sentence or a word in a piece of content.


A keyword or phrase on which you want to position yourself on search engines.

The alt attribute:

It is descriptive text that will replace a visual, such as an image. Very useful for understanding related content for SEO algorithms, but also for people using reading assistants. It is also the default item displayed when pages are not loaded correctly.

The crawl:

The crawl is nothing but the act of crawling web content. The crawlers are the search engine robots that will come and study the content of your site.

Anchor links:

These are links to navigate on the same page.

Organic links:

These are the spontaneous sharing links of Internet users enjoying your content. The typical case are social media posts.

Link bait:

Link of content intended for mass relaying.

Link farm:

A site dedicated to the publication of links to optimize SEO. It is a dangerous technique that search engines disapprove of.

Long tail:

This is a keyword that is several words long like a phrase to benefit from less competition on demand.


This is data processing data. This is information to be filled in to aid search engine analysis.


This is a link attribute used to tell search engine algorithms not to visit the following link.

off-site SEO:

All the practices intended to optimize the SEO of a site outside the same site (eg: netlinking strategy, social media communication, etc.).

on-page SEO:

Gathering of SEO practices specific to each page of your site (eg: setting up metadata, placing keywords, etc.).

on-site SEO:

Set of optimization techniques implemented within the site architecture (eg: database optimization, loading time optimization, etc.).


Instructional document for search engine algorithms.


SEA for search engine advertising encompasses all the commercial techniques implemented in order to obtain so-called unnatural visibility on the site. These are the paid SEO techniques.

SEF Url:

This is the classification of links that use words rather than random strings, numbers….


Discipline encompassing SEO but also marketing and social media strategies to increase traffic.

SEO white hat:

Gathers all the recommendations of Google and other search engines to increase its traffic.

SEO Black hat:

All SEO techniques involving manipulations playing on the flaws of search engines and other unsavory tricks.


SMO is the discipline aimed at working on its strategy on social networks to boost its online traffic.

Canonical Url:

These are urls respecting a specific designation eg: www on each url.


UX is a field of web development bringing together the knowledge and techniques allowing the creation of an interface while respecting the user experience.

XML site map:

This is the site’s navigation map. It makes it easier to read the search engine algorithms. This is a document not visible to Internet users. An alternative for Internet users is the Html site map.

Références & Bibliographies



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