Analysis of the role of Web page snapshots in the process of search engine collection

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Why we just in search engine search box to enter the keyword to query, search engine will immediately on the vast expanse of the Internet, the inclusion of all the pages sweep, presented in front of us.

If you understand how the search engine works, you don't think so. Each page has a number of hyperlinks, links to other pages, and these pages still have a lot of hyperlinks, and can link to other pages ...

In this way, you finally find that almost all Web pages on the Internet are linked together. In fact, this is the search engine work principle, search engine use this way to find all the pages can be found, in fact, this seemingly a little silly, but the search engine is really used this means to make a bread.

Even more infuriating is that search engine every find a webpage, want to copy down, put in own pocket, in the end, it acquisition almost all Web pages on the Internet to pocket. This purse is the search engine's web database, which contains all the copied home pages.

Search engine 17842.html "> Big Brother Google, whose name comes from an almost impossible number in mathematics: Google, the number is 10 100 times, from the name of the Google search engine to see how greedy the appetite is, It has more than 400 million pages in its web database (as it says), and the 400 million pages are replicated on the Internet, and each of these pages is called a snapshot of a Web page.

When users use search engines on the Internet to search for Web pages, it is actually in search engine Web database search, users mistakenly think that the search engine at once on the Internet to find a Web page containing keywords.

Web pages on the Internet are not immutable, but are constantly added, deleted, and altered. Therefore, the search engine Web pages in the database also need to be updated in a timely manner, both the Internet to copy the Web page, if you delete a page on your site, then the search engine database replicas-the snapshot of the Web page will not be immediately deleted, but will be deleted after a paragraph. However, Google's snapshot of the page is marked snapshot archive time, then, at this point in time, the page must still exist. For example: July 20, 2008, open a Google snapshot of the Web page, which is shown by Google on July 10 to search and archive. What do you mean? This means that July 20, 2008, the webpage may have been deleted or updated, but July 10, 2008, when Google copied the Web page to copy the archive, the page is true.

Search engines also try to collect all the URLs that can be found, and the pages that contain the same keywords are queued, purely commercial search engines use pure business principles, and click-through to page ranking, so that the user's search efficiency to achieve the highest.

The site is indexed by search engines, in search engine query information, after each website information can see "snapshot", the snapshot has an updated date, snapshot update date more frequent, the more the site in the search engine weight, the site included rate faster, Below Houqingrong talk about how to improve the Web page snapshot Update method and affect the page snapshot update reason.

Factors to improve site snapshot updates:

Website updates, the site to adhere to update, so that the time to remind search engine site dynamic.

Website content, the site content original is good, can also reprint some suitable content, the title content and so on to slightly make the modification.

Cooperation and mutual help, the site can be related to the site Exchange links, PR high for good, although the PR not only table A site's weight, at least can represent in the search engine is a historical, general March above the station will have the PR value, the current Google PR value data update speed. With other web sites, you can make search engines crawl other people's websites, can be the clues to crawl to your site content.