Shulou(Shulou.com)06/03 Report--

I believe that many SEO practitioners are thinking hard about how to improve the ranking of the website, which is the so-called sharpening knife without cutting wood. Instead of starting from the appearance, it is better to lay a good foundation and solve the problem of SEO optimization from the substantive problems one step at a time. So today we're going to review the basics that SEO must understand-- how search engines work. In fact, many of the problems we encounter in doing SEO work can be answered from the working principle of search engines.

1. What is a search engine

I believe that we are no stranger to the search engine, simply speaking, it is a search tool, which can be roughly divided into integrated search engine and vertical search engine. For example, Baidu and Sogou are integrated search engines, while the petal network that specializes in searching pictures is a vertical search engine. It can also be shopping search, social search, or even on-site search and web-wide search. For SEO workers, search engine mainly refers to the PC side, such as Google, Yahoo, Bing, Baidu, Sogou, 360 and so on. Mobile phone Baidu, Shenma search, mobile phone Sogou and so on. And now the newly launched headline search, Wechat search, Aliquark search, Huawei search and so on.

2. Why learn how search engines work?

In fact, for practitioners who do SEO optimization, no matter what search engine research is done, it is meaningful. Because the ranking rules of all search engines are more or less the same, only when we understand how it works in detail, can we do a better ranking. As the old saying goes, it is even more important to know why. We should advocate scientific SEO optimization work, data-oriented, and reconstruct our own SEO thinking. To give you an example, we all know the importance of accurate free traffic. Search engine principles on the index and ranking are answered how to improve the overall collection of the site, as well as the overall keyword ranking of the site.

3. What is the working principle of search engine?

The working principle of search engine is mainly in accordance with the following three steps, namely, crawling, preprocessing and ranking. Crawling roughly involves the robots protocol, tracking connections, attracting spiders, submitting connections, or xml. As for preprocessing, Nordic probably includes text extraction, stop words, Chinese word segmentation, forward index and inverted index and so on. The final ranking is search word processing, search query words, correlation calculation, ranking filtering and adjustment. Let's talk about the three steps of search engine work in detail.

(1) crawling and crawling

Search engine spiders generally adopt two strategies of breadth and depth, that is, from the home page to the column page to the article page, and from a link directly to the link. For example, the robots of the website is generally the place that spiders patronize first, so many people who do SEO also put such as site maps into robots. Of course, the crawling of search engine spiders can also be shielded, for example, the crawling of Baidu spiders.

(2) Pretreatment

Preprocessing is also called indexing, which means that search engines put publicly accessible pages on the Internet in one place for processing, such as extracting those texts, removing duplicates, judging the quality of content, and so on. The two most difficult concepts to understand here are forward and reverse indexing. The forward index is indexed by keywords, while the reverse index is processed with the file name as the master code, which is relatively efficient and placed in the library after processing.

(3) ranking

For SEO optimization, it is very important to understand how search engines work. Because only in this way can you know why your web page doesn't rank? Or what are the factors that affect the ranking? There are many factors about search engine ranking. Here are six main factors for Baidu: relevance, authority, timeliness, importance, richness, and popularity. To put it simply, in order to get a good ranking, there must be a strong correlation between the keywords of your web page and those searched by users, and the content of the official website must be more authoritative and authoritative. And the content of the user's search results had better be up-to-date and highly match the keywords and web content that the user is looking for. In addition, the richer the content of the page, the more it can meet the needs of users.

This is the end of the analysis of the basic knowledge of SEO optimization. I believe you have a certain understanding of the working principle of search engines. Generally speaking, to do SEO optimization, we must fully understand and master the working principle of search engines. Because only in this way, can we see the nature of the problem through the appearance, so that the website can get a better ranking, so as to achieve the purpose of drainage and realization.

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