Aweb directory orlink directory is an online list or catalog ofwebsites. That is, it is a directory on theWorld Wide Web of (all or part of) the World Wide Web. Historically, directories typically listed entries on people or businesses, and their contact information; such directories are still in use today. A web directory includes entries about websites, including links to those websites, organized intocategories and subcategories.[1][2][3] Besides a link, each entry may include the title of the website, and a description of its contents. In most web directories, the entries are about whole websites, rather than individual pages within them (called "deep links"). Websites are often limited to inclusion in only a few categories.
There are two ways to find information on the Web: bysearching orbrowsing. Web directories provide links in a structured list to make browsing easier. Many web directories combine searching and browsing by providing a search engine to search the directory. Unlike search engines, which base results on a database of entries gathered automatically byweb crawler, most web directories are built manually by human editors. Many web directories allow site owners to submit their site for inclusion, and have editors review submissions for fitness.
Web directories may be general in scope, or limited to particular subjects or fields. Entries may be listed for free, or by paid submission (meaning the site owner must pay to have their website listed).
RSS directories are similar to web directories, but contain collections ofRSS feeds, instead of links to websites.
During the early development of the web, there was a list ofweb servers edited byTim Berners-Lee and hosted on theCERN webserver. One historical snapshot from 1992 remains.[4] He also created theWorld Wide Web Virtual Library, which is the oldest web directory.[5]
Most of the directories are general in on 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. For example, there are shopping directories that specialize in the listing of retaile-commerce sites.
Examples of well-known general web directories areYahoo! Directory (shut down at the end of 2014) andDMOZ (shut down on March 14, 2017). DMOZ was significant due to its extensive categorization and large number of listings and itsfree availability for use by other directories and search engines.[6]
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There have been many attempts to make building web directories easier, such as using automated submission of related links by script, or any number of availablePHP portals and programs.
Directories have various features in their listings, often depending upon the price paid for inclusion:
rel="nofollow" attribute associated with the link, meaning search engines will give no weight to the link | This sectiondoes notcite anysources. Please helpimprove this section byadding citations to reliable sources. Unsourced material may be challenged andremoved.(April 2019) (Learn how and when to remove this message) |
A human-edited directory is created and maintained by editors who add links based on the policies particular to that directory. Some directories may prevent search engines from rating a displayed link by using redirects,nofollow attributes, or other techniques. Many human-edited directories, includingDMOZ,World Wide Web Virtual Library,Business.com andJasmine Directory, are edited by volunteers. 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 adoptedwiki 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 website. These options typically have an additional fee associated but offer significant help and visibility to sites and/or their inside pages.
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Bid for Position directories, 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.
Web directories will often make themselves accessing by more and more URLs by acquiring the domain registrations of defunct websites as soon as they expire, a practice known asDomain drop catching.
Reciprocal links may not help with competitive keyword rankings, but that does not mean you should avoid them when they make sound business sense. What you should definitely avoid are manipulative reciprocal linking schemes like automated link trading programs and three-way links or four-way links.