The Net Group provides search engine optimization and marketing and is one of many international search engine optimization companies.
Basically, a search engine is a web server program/script that searches for sites based on the words that you designate as search terms. Search engines look through their own databases of information in order to find what it is that you are looking for.
Are Search Engines and Directories The Same Thing?
Search engines and directories are not the same thing; although the term "search engine" often is used interchangeably. Search engines automatically create web site listings by using spiders that "crawl" web pages, index their information, and optimally follows that site's links to other pages. Spiders return to already-crawled sites on a pretty regular basis in order to check for updates or changes, and everything that these spiders find goes into the search engine database.
What is a Spider?
A spider is an automated program/script that enters your website and categorizes the information contained in the site and determines your sites ranking in search requests by users. Unfortunately, each spider has it's own personal agenda as it indexes your site. Some utilize META tag keywords, another may use the beta description of your site, and some use the first sentence or paragraph on your sites homepage. In other words, a page that ranks well on one search engine may not rank as well on another.
Please note: search engines are not simple. They include incredibly detailed processes and methodologies, and are updated all the time. All search engines go by this basic process when conducting search processes, but because there are differences in search engines, there are bound to be different results depending on which engine you use. The searcher types a query into a search engine. Search engine software quickly sorts through literally millions of pages in its database to find matches to this query. The search engine's results are ranked in order of relevancy.
What are the major search engine directories?
The major directories are Yahoo, Google, Ask, DMOZ, Bing (formerly MSN), Alta Vista, Excite, Magellan, Webcrawler, Hotbot, Thunderstone, What U Seek, Lycos, and others. If you're wondering why AOL was left out, it's simply that AOL gets their results from the likes of Inktomi and DMOZ. Therefore, if you get listed in one of those, you will be listed in AOL and Inktomi powered by Yahoo.
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