On the relationship between spiders and SEO optimization

Want to do SEO optimization, you can not but start from the principle of search engine, search engine mainly by the Web page automatic indexing program + Word + Index + query + user experience several mechanisms. And the most front-end indexing work is what we often say "search engine spider" Work, the spider is responsible for the page's crawl production index and then participle. In short, the search engine spider is, search engine sent to crawl your Web data back to the action, as for the back end of the operation is completely unrelated to the spider.

Spiders keep crawling down the link

The spider English translates into the Web Spider, is a very abstract name. SEO staff often likened the network to a spider web, then the Internet spider is crawling to crawl the spider. Web spider is through the Web site and the link between the Web site to find a page, from a site to read the content of a page, to find in the Web site of other Web sites crawling down, continuous cycle, which is why the increase in external links can improve the speed of the search engine included the main reason.

The weight of the site decision search engine included or not included

A site by the search engine contains the number of pages to determine the weight of the site, this is a very important SEO ranking staff a job, next we will see how the search engine is included or not included.

For any search engine, to crawl all the Web page is almost impossible, from the current published data, search engine Baidu is just grabbed the entire network world 40% of the Web page. There are three main reasons why you cannot crawl completely:

I. The volume of documents is too large: there are about 10 billion web pages worldwide, with a total capacity of 200000G.
Second, download time: The assumption that a server download 20K calculation per second, requires 340 machines 24 hours of continuous download a year, you can download all the Web page.
Third, the full collection results in low search efficiency: Because the volume of data is too large, in the provision of search will also have the problem of efficiency.

Because of the above reasons, small head bid price adjustment software that search engine spiders only crawl important pages, and the decision to catch or not grasp the main reason on the site weight of the decision, the higher the weight of the search engine spiders more often crawling. One of the factors of site weight is the quality of external links and internal links.

Search engine spiders in the crawl page in general there are two ways:

Breadth First:

Web spiders will first crawl all the pages of the navigation, and then select one of the pages down to grasp a whole layer, similar to the level of grasping method. This is the most common way, mainly for new sites or less weight of the site to take the breadth first, because this way can let the spider parallel processing, improve crawl speed.

Depth First:

Web spiders will be from the first link to a link down from the home page to catch, caught no link before looking back to the page from the second link down, similar to the vertical grasping method. The advantage of this method is that it can be used to crawl an entire Web site with integrity, usually for a richer web site with a higher weighting.

The key word on the crawling link is called anchor text

The spider will analyze the text on this link to represent the main content that points to that page, for example, the key word is "network marketing" and when the click of the keyword to arrive after the content of the Web page must be on the web marketing related content, when this mechanism is formed will be "network Marketing" this keyword to bring weight, Conversely, if the keyword has nothing to do with the point content, it will not get the weight score, not even included!

The length of time the spider visits the website depends on the weight of the website

Search engine spiders to the same level of weight of the site included time is the same, when visiting your website time assumption is 2 minutes, spiders in this two minutes after the page, will leave. This is the derivation of another problem is the stability of the virtual host and the optimization of the site structure, the slow speed of the virtual host of course, spiders crawl slowly, the site structure leads to spiders at a loss, the collection of inefficient and natural included in the page is less.
The faster the website information is updated, the faster the spider comes.

Some of the web pages are often updated, some are Yinianbanzai have not changed, the characteristics of the spider is that you update the faster the spider will come more frequently, the more frequently included in the page more. So for SEO optimization we have to do is the constant and stable update frequency, the more pages included in the weight of the site, the higher the weight of the site, high natural ranking.

The more sources of external links, search engines will also come faster, so some people say that the value of the PR is equivalent to the search engine visit speed, there is some truth, but there is no actual evidence to prove this claim.

Above by the small head bidding price adjustment software to provide trial preparation, trial registration: http://vip.xiaonaodai.com/index.php?act=register&fromid=7.
Consulting qq:928122192 Hotline: 025-68781265