Drupal

Drupal is an open source CMS, which can be downloaded and used for free. The system is written with an open code, allowing developers and programmers to apply it in developing third party applications.

In addition, Drupal is considered to be one of the most popular content management systems, and it has a fairly comfortable interface, as well as a mixture of features and tools allowing users to develop and add content to websites for personal use, for businesses both big and small, and for portals, stores and social networks.

Duplicate Content

Duplicate content is content that repeats itself within a given website. Search engines, especially Google, are programmed to devalue duplicated content, and may be the cause for a website to drop in the rankings.
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Dead/ Broken link

A broken link or dead link is a link on a web page that no longer works because the website is encountering one or more of these reasons: an improper URL entered, the website removed the page without redirecting (causing a 404 error), The website permanently moved or no longer available, the user has a firewall that blocks the website etc.
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Domain

A domain is the private and unique name of a website. A domain’s name is usually comprised of a ‘www’ prefix, the name of the website (for example ‘domain’), and a suffix (for instance ‘com’), separated by ‘dots’ (the period punctuation mark).
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Doorway page

Doorway page (bridge page, gateway page and jump page) is a page created and optimized specifically to rank well in search engines organic listings (non-paid) for particular keywords, and functions as an entry page where visitors pass to the main website.
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Drupal

Drupal is an open source CMS, which can be downloaded and used for free. The system is written with an open code, allowing developers and programmers to apply it in developing third party applications.
Read more