Third, how to arrange the web page
Search anything with your favorite search engine, the search engine almost immediately picks out those who match your topics from the millions of pages he know, rendering on your screen. These web pages are arranged in a certain order, and the most relevant rows are in front. But the search engine is not a librarian, he has no ability to ask questions about the problem to better locate the search, and can not rely on intellectual judgment and past experience to arrange web pages, and people can do. Intelligent is the direction of development, but there is still a long way to go. So how does the search engine determines related? They rely on a set of rules, the main rules are the position and frequency of keywords in the page, and we call this "position / frequency method".
1, location and frequency
(1) Location If you go to the library to find a book about tourism, the administrator will first look for books with "travel" in the topic. Like the search engine, keywords (ie "Tour") appear in the Title to more relevant pages that do not have keywords in Title. The search engine also checks if the keyword appears at the top of the page, such as the article title or several paragraphs in front. They think that the page related to the search topic will mention those words.
(2) The frequency frequency is another major factor in correlation. The search engine will analyze the frequencies of keywords in the page relative to other words, the higher the frequency, and the more dependent.
2. Search engine has a certain difference in the rack of web pages
All search engines have the three basic parts mentioned above, in line with the "location / frequency method", but there is a difference in specific implementation, which is why we do the same search with different search engines. The reason for different results will occur. First, some search engines will index more web pages than other search engines, and some will be more frequent than other engine updates, so it is impossible to collect exactly the same web page in search engine indexes. Second, for some reason, some search engines may also give some Web pages in the arrangement level. For example, Excite uses links to arrange a factor in the web page, he knows which pages in the index have many links to their links, and he gives these pages small rewards when they are arranged, put them properly. This is also reasonable because there are more links to their links on the Internet, indicating that these pages are more valued. In addition, some mixed structures (search engines and directory coexisting) search engines may put the webpage of the existing sites in those directories, the reason is that a site is good enough to put it in the directory, you should have the opportunity to be more than those The page of the site in the directory is on the top of the directory. Finally, it is necessary to emphasize that many web page designers mistakenly think that "meta tags" is the secret to mention the list of the list in the list. In fact, some search engines will put those "meta tags" with keywords, some Search engines do not read "Meta Tags" at all. "Meta tags" is a solution to the problem, but it is not a necessary top secret weapon.
