Understanding the principle of search engine and understanding the essence of SEO

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This article is I read Zac Free ebook notes, deep Feeling, I think is the focus of the place to do the notes, to share with you, welcome to discuss.

SEO industry has been circulating a word: "The highest level of SEO is to forget seo." "Read the Zac search engine a text, Xiao Feng want to say:" In the realm did not reach the blindly follow, the foundation play well, really understand the true meaning of SEO, with SEO awareness, you can put SEO forget! "What is SEO, Chinese translation is search engine optimization, to remember optimization is not the keyword ranking, Optimization is the search engine, some people do not understand, is not a meaning, but in fact, I mean the optimization of search engine friendliness. Many seoer like to stand in the search engine hostile stance, the search engine as an enemy to fight, from time to time with a point of violence, the result is harmonious. Now change position, standing in search engine position to understand search engine. The so-called know that the hundred war is not idle, put aside other aspects, only to talk about technical problems, the current search engine has the following problems: (above is my point of view, not Zac originally described)

Here are the notes:

1. Quickly and comprehensively crawl the Internet page:

The Internet has countless pages updated every day, created to return useful content, search engines to crawl the latest pages. For this to be reasonable to build a Web site link structure (tree structure is the most scientific!) Eliminate the search engine can not identify the content, such as Flash,javascript script, do not need to login to visit the Site page and so on to reduce the search engine crawl page content difficulty, enhance friendliness.

2, fast and efficient storage of massive information data:

The era of information explosion, a number of large web sites have millions or even tens of thousands of pages, it is conceivable that all the pages on the Web add up is what the amount of data. Search engine crawl The page of Dali, to write this data to the server, so in order to increase the friendliness, our data structure must be reasonable, the site's access speed is very high.

3. Fast and accurate index information data:

Search engine crawl data and storage, but also to the data information index calculation, in order to query processing. In view of this we should be reasonable to increase the keyword density, reasonable layout keywords, increase the relevance of the site to increase the friendliness of the search engine.

4, Quick query processing the user's search request:

After the user enters a keyword, after clicking the Search button, it usually returns the search results in less than a second. Find the most reasonable and relevant 1000 pages in tens of millions of pages that contain keywords, in accordance with the relevant, authoritative arrangement. For this we can do is the relevance of the premise, as much as possible to increase the weight of the page. (If you increase the weight of the page)

After learning some of the major difficulties of the search engine, let's look at how the search engine works:

Search engine work can be divided into three stages:

1, crawling and crawling: Search engine spider through the tracking link to access the page, get the page HTML code into the database.

This everyone can view the log of their own site, I put a few common spider names listed to

Baiduspider Baidu Spider

Yahoo!slurp Yahoo Spider

Yahoo! slurp/3.0 English Yahoo Spider

Googlebot Google Spider

msnbot/1.1 Microsoft Bing Spider

Sogou+web+robot Sogou Spider

Sosospider Search Spiders

Yodaobot Spider

2, preprocessing: Indexing program to capture the page data for text extraction, Chinese word segmentation, index processing, for sorting calls.

All we need to know about search engine traversal strategy

One is depth first, the other is breadth optimization.

* Depth First:

Refers to the spider along the discovery Link has been crawling forward, until there is no other link before, and then return to the first page, along another link and then crawl forward

* Breadth First:

When a spider finds many links on a page instead of following a link, it crawls all the first-level links on a page and crawls to the third-tier page along the links found on the second-tier page.

This shows that, to their own more pages are included, it is necessary to find ways to attract spiders.

3, ranking: User input keyword, ranking program call Index library data, calculate the relevance, and then in a certain format to generate search results page.

In order to enhance the friendliness, should try to reduce the burden of search engine. such as to stop the word, such as, the ground, and so on the auxiliary, ah, ha, ah, and so on the exclamation, so, to, but such a preposition. These words have no effect on the content, the frequency is very high, before the index page will drop these stop words, remove will make the index data topic more prominent, reduce unnecessary calculation.

Instruction Search: (The following instructions have no special instructions, Baidu Google support.) )

1, double quotes: Perfect match, with this can more accurately find a specific keyword competitors.

2, minus: On behalf of the search does not contain the following words page. When using this instruction, the minus sign must be preceded by a space, followed by no spaces. Follow the words that need to be ruled out.

3, inurl: For search queries appear in the URL of the page. You can also use this command to find a competitor more accurately.

4, Inanchor: Returns the result is the link anchor text contains the search Word page, currently only Google supports this instruction. This instruction allows you to study the external link anchor text of the competitor.

5, intitle: Instruction return page title contains the keyword page. With this command can be more accurate to find a stronger competitor, general SEO common sense of the opponents will put keywords in the title.

6, Site: SEO is most familiar with the advanced search instructions, used to search a domain name under all the included files.

7, but site: instructions are not accurate, especially Google, the return of the included page often has a large fluctuation, can only be used as a reference.

8, Link: Used to check outside the chain, Baidu does not support, Google will randomly show a small part of Yahoo more accurate, using the format link:http://www.tourjob.cc/

9, Linkdomain: The directive only applies to Yahoo, returns is a domain name reverse link. Usage：

Linkdomain:ruhao.net-site:ruhao.net

Get is ruhao.net site outside the link, because-site:ruhao.net has been excluded from this site's page is internal links, the rest is the external link.

10, Related: The directive only applies to the Google, returns the result is a website related page. Usage：

related:1009.cc

11, the comprehensive use of advanced directives:

Combined to use the ever-changing, powerful, a qualified SEO must be proficient in the meaning of these common instructions and the combination of methods to effectively find more competitors and linked resources.

This article by the Chinese Tourism Talent Network (http://www.tourjob.cc/) collection and collation, reproduced please specify the source, but also please share with us to discuss.