Analysis of search engine spider technology in SEO

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Search engine technology to crawl the vast amount of information in the network, as the information growth of the role of the technology has become more and more protruding, as a SEO technician, although not necessarily like Zac on the Search engine optimization technology is very thorough understanding, but the analysis of the spiders of search engines on the file processing methods, research its search is as seoer business development needs. Any site as long as the content update + outside the chain can see the search engine on the site to make the corresponding analysis, and then increase the weight of the page, to understand the search engine technology, so that we based on the actual principle of search engine optimization, this is the smart SEO, rather than every day in that hair outside the In my spare time, I have to learn the relevant techniques. Below describes search engine core retrieval technology.

The working principle of a spider

Web Spider is the search engine spider, is through the link address to look for the webpage. Search engine spider name according to search engine are different. The principle is to start by starting a link to crawl the content of the Web page, but also to collect the links on the Web page, and the link as it next to crawl the link address, so the cycle, until a certain stop condition will stop. The setting of the stop condition is usually based on time or quantity, which can limit the crawling of web spiders by the number of layers linked. At the same time the importance of page information as an objective factor determines the spider's search for the site page. Webmaster tools in the search engine spider Simulator In fact it is this principle, quasi-do not really know the author. Based on the principle of the spider, the webmaster will not naturally increase the number of page keywords appear, although the density of the changes in the amount, but the spider does not reach a certain quality changes. This should be avoided in the search engine optimization process.

The interaction between Spider and website in two search engines

Search engine technology based, spiders crawl to the site, usually to retrieve a text file Robots.txt, usually stored in the root directory of the site. It is a special file used to interact with web spiders. This is also seoer always go to screen site page does not want to be search engine crawl reason, it is a website and search engine spider dialogue important tool, but whether the spider all follow stationmaster to its implement rule? In fact, spiders follow or have to look at spider origin, high quality will follow the rules, the contrary is not followed. In addition, put a Web page called sitmap.htm in the website, and it as the portal file, this is the spider and the site interaction method. For interactive SEO means, we understand can be targeted to make the search engine spiders like the site map.

Page Meta field is also often used by Webmaster Search Engine Optimization technology, this field is usually placed in the head of the document, many sites are simply write a allow Baidu to crawl the field, is not correct I do not know, SEO in fact, many phenomena are based on data analysis and comparison to know. Meta field spiders can learn about documents without having to read all the documents, and can avoid unnecessary waste by taking down invalid pages and discarding them.

Three search engine spider for file processing

(i) Binary file processing

In addition to HTML files and XML files in the network, there are also a large number of binary files, the search engine for the binary file using a separate approach, its understanding of the content of the need to rely on the binary file anchor point description to complete. The anchor point description usually represents the title of the file or the basic content, which is usually called the anchor text, which is why we want to analyze the site anchor text of the choice.

(ii) Processing of script files

Web page in the client script, when the page loads to read to the script, the search engine tends to omit its processing directly. However, as the web designer for the lack of refresh page requirements and the use of AJAX technology, the analysis of its processing will often adopt another web search program, because of the complexity and diversity of scripts, usually webmaster will be based on their own web site to store these scripts into a document, using the call technology, This speeds up the loading of the page, while the spider cannot parse the call file. This is also part of the Search engine optimization technology, if neglected to deal with it will be a huge loss.

(iii) Processing of different file types

The Web page content extraction analysis has been an important technical link of web spiders, this is SEO need to understand the search engine technology, depending on the site information update diversity. This is why the professional Web site will be attached to the site download the execl,pdf and other file types, which is also part of the search engine optimization process need attention. Network of different file types of file processing, web Spiders are usually used to deal with Plug-ins. If you have the ability, the website information content updates as far as possible to take the diversity, helps the website to reach a search information diversification the SEO system.

Strategy analysis of four search engine spiders

(i) Search strategy

Search strategies generally have a depth-first search strategy and a breadth-first search strategy.

Breadth-first search strategies are generally considered blind search. It is a greedy search strategy that takes precedence over searching more Web pages. As long as there is something to retrieve, it crawls. It reads a document, saves all the links on the document, and then reads all of the linked documents and goes through them sequentially.

Depth-First search strategy Web spider program analyzes a document and takes out its first link to the document to continue the analysis, and then continues. Such a search strategy has reached the analysis of the structure of the site, as well as the depth of the page link analysis, so as to convey the site information.

There are also network algorithms, such as hash algorithm, genetic algorithm, etc. are based on search engine core technology, these can also be understood, such as the latest panda algorithm, which is based on a new search strategy algorithm, Google has been updated several times.

(ii) Update strategy

Based on the changing cycle of web pages, it is often used by small search engines to update only those pages that are constantly changing. This is why the webmaster will be a few weeks on the site page content of a small update, which is based on search engine optimization technology. Web crawlers often use individual updating strategies. It is based on the frequency of individual pages to determine the frequency of updates to the page, so basically each page will have a separate update frequency.

Based on the search engine principles to understand the seoer to enhance the search engine optimization technology, which is also a SEO technology. Search engine optimization Process naturally can do what they are doing, why to do so, rather than only hair outside the chain of mechanical operators. SEO technology is not difficult in fact, as long as the site optimization to do more, naturally can be handy le, refueling, seo!