Thursday, August 23, 2012

Classification of Search Engines

Types of Search Engines

There might be lots of search engines in the internet world but there are some where users give preference to. Because all search engines are not created equal and algorithm of each search engines differ from other. Based on the website traffic generation and relevant search, these are classified into three, they are
  • Primary Search Engine
  • Secondary Search Engine
  • Targeted Search Engine

Primary Search Engine:

A primary search engine is the type you think of most often when search engines come to mind. Some index most or all sites on the Web. For example, Yahoo! Google, and MSN are primary (also called major) search engines.

Primary search engines will generate the majority of the traffic to your web site, and as such will be the primary focus of your SEO efforts. Each primary search engine differs slightly from the others. Most primary search engines are also more than just search. Additional features such as e-mail, mapping, news, and different types of entertainment applications are also available from most of the primary search engine companies. These elements were added long after the search was established, as a way to draw more and more people to the search engine.

Secondary Search Engine: 

Secondary search engines are targeted at smaller, more specific audiences, although the search engine’s content itself is still general. They don’t generate as much traffic as the primary search engines, but they’re useful for regional and more narrowly focused searches. Secondary search engines, just like the primary ones, will vary in the way they rank search results. Some will rely more heavily upon keywords, whereas others will rely on reciprocal links. Still others might rely on criteria such as meta tags or some proprietary criteria.

Secondary search engines should be included in any SEO plan. Though these search engines might not generate as much traffic as the primary search engines, they will still generate valuable traffic that should not be overlooked. Many users of secondary search engines are users because they have some loyalty to that specific search engine.

Targeted Search Engine:

Targeted search engines - sometimes called topical search engines - are the most specific of them all. These search engines are very narrowly focused, usually to a general topic, like medicine or branches of science, travel, sports, or some other topic.

When considering targeted search engines for SEO purposes, keep in mind that many of these
search engines are much more narrowly focused than primary or secondary search engines

Source : Search Engine Optimization Bible - Wiley

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