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The 3 types of search engines are listed below:
Crawler-based engines: The search engines we have
discussed yet greatly fall under this category. Google, a
crawler-based search engine, prefer using an automated software
agent (well-known as crawler) in order to visit, study, and
index the websites. The entire informative details accumulated
by crawler arrive back to a central reservoir. It’s known as
indexing. Crawler-based search engines re-examine web pages
occasionally in a time frame that has been determined by the
administrator of that particular search engine.
Human-powered search engines: These types of search
engines depend upon the people for submitting the details that
are indexed and then returned as the search results. These
search engines are sometime known as directories. A good example
of these sorts of search engines is Yahoo!. Although it’s not
totally human-powered at present, it started its journey being
based on the same sense. However, Mahalo (www.mahalo.com),
a recently launched search engine, is totally human-power based
and it is creating a huge buzz all over the Web nowadays.
Hybrid search engines: These search engines aren’t
totally web-crawler based or totally human-power based as they
are the combination of both. Under a hybrid search engine,
people are allowed to submit their sites manually for inclusion
in the search results. However, there also include a web crawler
which monitors these websites before being included. Maximum
search engines that are available today generally fall under
this category to an extent. Although many are generally
populated by the web crawlers, others acquire some method
wherein people are allowed to submit their site information.
It’s significant to gain knowledge about these distinctions, as
how your website ends up indexed by any of the search engines
out there may acquire some manner on when it is indexed. For
instance, an entirety automated search engine that prefer using
web crawlers may index your web site a few weeks or even months
before a human-powered engine. It’s obvious as well because the
web crawler is a highly programmed application.
The search engine results’ accuracy, in all cases, will vary in
accordance to the used search query. For instance, entries that
have been made in a human-powered engine may be more technically
precise, but the used search query will decide if the wanted
results are returned.
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