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Since 2007, all links to other websites from English Wikipedia have the nofollow HTML attribute set. [12] This means that on pages that are indexed by search engines, any links found by a search engine on those pages should not influence the link target's ranking in the search engine's index.
Indexing low priority to high margin to labels like strong and link to optimize the order of priority if those labels are at the beginning of the text could not prove to be relevant. Some indexers like Google and Bing ensure that the search engine does not take the large texts as relevant source due to strong type system compatibility. [23]
The link farms helped stabilize listings, primarily for online business Websites that had few natural links from larger, more stable sites in the Inktomi index. Link farm exchanges were at first handled on an informal basis, but several service companies were founded to provide automated registration, categorization, and link page updates to ...
A doorway page will affect the index of a search engine by inserting results for particular phrases while sending visitors to a different page. Doorway pages that redirect visitors without their knowledge use some form of cloaking. This usually falls under Black Hat SEO. If a visitor clicks through to a typical doorway page from a search engine ...
Bing, Google, Yahoo and Ask now jointly support the Sitemaps protocol. Since the major search engines use the same protocol, [ 3 ] having a Sitemap lets them have the updated page information. Sitemaps do not guarantee all links will be crawled, and being crawled does not guarantee indexing. [ 4 ]
The What links here report will list a redirect to a page, and indented under it any incoming links to the page that go through that redirect. For a double redirect, the indent is double, and any incoming wikilinks to the page that go through the two intervening redirects are then shown triple indented.
A link-based search engine, such as Google's PageRank system, will not use the link to increase the score of the linked website if the link carries a nofollow tag. This ensures that spamming links to user-editable websites will not raise the sites ranking with search engines.
The engines' insistence on resource links being relevant and beneficial developed because many artificial link building methods were employed solely to spam search engines, i.e. to "fool" the engines' algorithms into awarding the sites employing these unethical devices undeservedly high page ranks and/or return positions. Google has cautioned ...