Understand search engine
Ping Wins 2003-6-4
In all networking methods, search engines are the most talks, and our promotion trips will start here. Indeed, the search engine is a very powerful weapon promotion, and free - but we must first understand them. We have to understand how they work, how to classify, how to query ..., and search engines are different like people, so we need to understand their personality. 1. Two most basic vocabulary: Search Engine: By running a software, the software automatically obtains information on the network through various links, and categorized in accordance with certain rules to form a database In order to query. Such sites (get information ==> sorting to establish database ==> Provide queries) We are called "Search Engine". The software used is generally called "Spider", "CRAWLERS", etc. Directory: Classify the site by "artificial" to create a database to provide a query, such a site called the "Category Directory". Typical search engines such as Altavista, Excite, Hotbot, InkTomi, etc., and the most important classification directory is Yahoo. In fact, regardless of the "search engine" or "classified catalog", the target is the same: obtain the website information, establish a database to provide queries. Only the method used is different. Because the database is automatically carried out, its database is very large, but it is often not accurate enough with the results of the query; and the "classification directory" is accurate due to the information of the information, but the content of the collection Very limited. We usually collect these two categories as "search engine". In the following discussion, we will be based on "automatic" search engines. As for "artificial" as Yahoo, I will discuss it in "Chinese Yahoo". 2, the main search engine: Seven the most important search engine and each included page number: Engine AltavistanorthanlightinkTomiexcitelycosinfosekwebcrawler page number (Million Page) 150125110550452 (above data is the statistics on February 1, 1999) 3. Search engine work Three steps: The first step is "Spider" software to access a site, and read the page of the site through the link, and "Spider" will automatically return to the site from time to time to check the change; the SPIDER "get the site information Form a huge network information library, such as backups that have accessed the site throughout the network, of course, not all content recorded. This is what we said. The third step is to query the service. This is implemented by querying software, when you enter the query content, the software will find the relevant content in its database, and then sort it according to "It" rules. 4, how to ranked when searching: The most important thing is based on the level of content and query words, but how is a site content search engine? - Title (Title), keywords, description, content of the page start section, and the degree of correlation between these content itself. And most of the search engines now support Metatag. Another major factor is a degree of association on the entire network, that is, the number of sites that appear in other sites in the network (LinkPopularity). Although different search engines have their own "Game Rules", please remember the word "correlation", including the site and outside (the entire network).
