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{{refimprove|date=January 2009}} A '''web directory''' or '''link directory''' is a [[directory (databases)|directory]] on the [[World Wide Web]]. It specializes in [[hyperlink|linking]] to other [[web site]]s and [[Categorization|categorizing]] those links.{{Cite web|url=http://websearch.about.com/od/enginesanddirectories/a/subdirectory.htm|title=What is a Web Directory|accessdate=2010-02-25|publisher=About.com|author=Wendy Boswell}} A web directory is not a [[Web search engine|search engine]] and does not display lists of web pages based on [[keyword (internet search)|keyword]]s; instead, it lists web sites by category and subcategory. Most web directory entries are also not found by [[Web_crawler|web crawlers]] but by humans. The categorization is usually based on the whole web site rather than one page or a set of keywords, and sites are often limited to inclusion in only a few categories. Web directories often allow site owners to submit their site for inclusion, and have editors review submissions for fitness. '''RSS directories''' are similar to web directories, but contain collections of [[RSS feeds]], instead of links to web sites. ==Scope of listing== Most of the directories are general in scope and list websites across a wide range of categories, regions and languages. But some niche directories focus on restricted regions, single languages, or specialist sectors. One type of niche directory with a large number of sites in existence is the [[shopping directory]]. Shopping directories specialize in the listing of retail [[e-commerce]] sites. Examples of well known general web directories are [[Yahoo! Directory]] and the [[Open Directory Project]] (ODP). ODP is significant due to its extensive categorization and large number of listings and its [[open content|free availability]] for use by other directories and search engines.Paul Festa (December 27, 1999), [http://www.news.com/2100-1023-234893.html Web search results still have human touch], ''CNET News.com'', retrieved September 18, 2007 However, a debate over the quality of directories and databases still continues, as search engines use ODP's content without real integration, and some experiment using [[Data clustering|clustering]]. There have been many attempts to make directory development easier, such as using automated submission of related links by script, or any number of available [[PHP]] portals and programs. Recently, [[social software]] techniques have spawned new efforts of categorization, with [[Amazon.com]] adding [[Tag (metadata)|tagging]] to their product pages. Directories have various features in listing, often depend upon the price paid for inclusion: *Free submission – there is no charge for the review and listing of the site *Reciprocal link – a link back to the directory must be added somewhere on the submitted site in order to get listed in the directory *No Reciprocal link — a web directory where you will submit your links for free and no need to add link back to your website. *Paid submission – a one-time or recurring fee is charged for reviewing/listing the submitted link *[[No follow]] – there is arel="nofollow"attribute associated with the link, meaning search engines will give no weight to the link. *Featured listing – the link is given a premium position in a category (or multiple categories) or other sections of the directory, such as the homepage. Sometimes called sponsored listing. *Bid for position – where sites are ordered based on bids *[[affiliate marketing|Affiliate links]] – where the directory earns commission for referred customers from the listed websites ==Human-edited directories== A human-edited directory is created and maintained by editors who add links based on the policies particular to that directory. Human-edited directories are often targeted by [[search engine optimization|SEOs]] on the basis that links from reputable sources will improve rankings in the major [[Web search engine|search engine]]s. Some directories may prevent search engines from rating a displayed link by using redirects, [[nofollow]] attributes, or other techniques. Many human-edited directories, including the [[Open Directory Project]], [[Salehoo]] and [[World Wide Web Virtual Library]], are edited by volunteers, who are often experts in particular categories. These directories are sometimes criticized due to long delays in approving submissions, or for rigid organizational structures and disputes among volunteer editors. In response to these criticisms, some volunteer-edited directories have adopted [[wiki]] technology, to allow broader community participation in editing the directory (at the risk of introducing lower-quality, less objective entries). Another direction taken by some web directories is the paid for inclusion model. This method enables the directory to offer timely inclusion for submissions and generally fewer listings as a result of the paid model. They often offer additional listing options to further enhance listings, including features listings and additional links to inner pages of the listed web site. These options typically have an additional fee associated, but offer significant help and visibility to sites and/or their inside pages. Today submission of websites to web directories is considered a common SEO (search engine optimization) technique to get back-links for the submitted web site. One distinctive feature of 'directory submission' is that it cannot be fully automated like search engine submissions. Manual directory submission is a tedious and time consuming job and is often outsourced by the webmasters. ==Directories and Search Engine Optimization== There has been quite a bit of confusion as to whether links in directories can benefit a site in terms of search engine rankings. One of the reasons is directories charge for the review of a submitted site, and that has often been equated with buying links for SEO purposes, which people like Matt Cutts at Google have said can be problematic. Directories can be helpful so long as there is a proper editorial policy where not all links are accepted, and there is clear editing when it comes to anchor text and site descriptions. Paying for position in a directory can be more problematic. Bid for position directories or directories that sell site wide links can be more of an issue. Even featured links can be considered paid links by search engines like Google. Getting listing in a directory that has a good editorial policy so that there are high quality links with good titles and descriptions is still thought to be a good way to get links to a website. It is just important to be thoughtful of those directories or practices that have been reported to be harmful.{{cite web|title=Paid Links and Directories |url=http://www.phplinkdirectory.com/Paid_Links_and_Directories.php|publisher=phplinkdirectory.com|accessdate=January, 7, 2012}} ==Bid for Position directories== '''Bid for Position directories''' or also known as bidding web directories, are paid-for-inclusion web directories where the listings of websites in the directory are ordered according to their bid amount. They are special in that the more a person pays, the higher up the list of websites in the directory they go. With the higher listing, the website becomes more visible and increases the chances that visitors who browse the directory will click on the listing. ==See also== *[[Article directory]] *[[List of web directories]] *[[SOBI2]] *[[Webring]] *[[Directory Scripts]] ==References== {{reflist}} [[Category:Search engine optimization]] [[Category:Web directories|*]] [[ar:دليل مواقع الويب]] [[ca:Directori web]] [[cs:Internetový katalog]] [[da:Linkkatalog]] [[de:Webverzeichnis]] [[el:Κατάλογος ιστοσελίδων]] [[es:Directorio web]] [[fa:فهرست وب]] [[fr:Annuaire web]] [[hy:Համացանցային Դիրեկտորիա]] [[id:Direktori web]] [[it:Web directory]] [[he:מדריך אתרים]] [[nl:Linkpagina]] [[ja:ウェブディレクトリ]] [[mhr:Интервот-каталог]] [[pl:Katalog stron WWW]] [[pt:Diretórios de sites]] [[ro:Catalog de Internet]] [[ru:Каталог ресурсов в Интернете]] [[simple:Web directory]] [[sk:Internetový katalóg]] [[sl:Spletni imenik]] [[fi:Linkkikirjasto]] [[sv:Länkkatalog]] [[th:สารบบเว็บ]] [[tr:Web dizini]] [[uk:Веб-каталог]]
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