- submitting URLs of pages deep in your site to the search engines. For example, if a webmaster of 200-page website submits each of those 200 pages. This tactic is frowned upon by some search engines because it unnecessarily clogs up their submission database when the search engine spider could find those pages on its own by exploring links starting at the home page.
Highly popular social bookmarking website.
A URL that has been removed from a search engine’s index [link:]. Delisted sites are ignored by search engines. A site may become delisted for many reasons:
- Engaging in Black-Hat SEO[link:] tactics
- Pages on new websites (or sites with limited link authority relative to their size) may be temporarily de-indexed until the search engine does a deep spidering and re-cache of the web.
- Pages which have changed location and are not properly redirected, or pages which are down when a search engine tries to crawl them may be temporarily de-indexed.
- If a website tripped an automatic spam filter it may return to the search index anywhere from a few days to a few months after the problem has been fixed.
- If a website is editorially removed by a human you may need to contact the search engine directly to request re-inclusion.
- During some updates search engines readjust crawl priorities.
Social news site where users vote (or “Digg”) on which stories get the most exposure and become the most popular.
- A search site whose index is compiled by human editors (as opposed to web spiders). Although editors may pro actively include sites they consider to be of value, most inclusions are the result of submitted requests. The decision to include a site, and its subsequent ranking and categorization, is one of editorial judgment rather than being computed by an algorithm.Some directories cater to specific niche topics, while others are more comprehensive in nature. Major search engines likely place significant weight on links from DMOZ[link:] and the Yahoo! Directory[link:]. Smaller and less established general directories likely pull less weight. If a directory does not exercise editorial control over listings, search engines will be far less likely to trust their links.