In July, the focus of Jingcheng's network work was changed from data filling to network promotion: how to effectively increase the number of high-quality external links in Seo

SEO practitioners in China may often hear the following sentence: "You don't know how to modify Meta, but you must know how to do external links ." It can be seen that the external chain is pushed to a very high level by many SEO practitioners as a means of Seo optimization.

In fact, this is true because all Seo work is to make search engines friendly to their website pages, however, page optimization has a standard for search engines. This standard is like an extreme value. No matter how you optimize it, It is infinitely close to this extreme value, but it cannot be exceeded, however, the external chain is an infinite value as an external factor, so the external chain will be perceived to be quick and stable, it is also the simplest and easiest way to measure the problem. But if you really want to talk about how to effectively optimize external links, do you really understand? To understand and effectively optimize external links, we may need to analyze and model the running modules and principles of search engines.

If Seo is a service search engine, the optimization of external links is the spider module of the Service search engine. If spider crawls your website through a large number of links, then he may determine that you may be an information node in these webpages and the source of the information, so as to give you a considerable weight. This is the meaning of external links for search engines and also for Spider.

Let's take a look at Spider's work. As a server, spider crawls web page information from an Internet information node and transmits it back to the database. At the beginning of the Internet, websites mainly focus on comprehensive information, so spider is relatively simple, and the sorting mechanism of the entire search engine is relatively simple. However, with the development of the Internet, the Internet information is constantly subdivided, and the work of SPIDER has become more complicated. In order to quickly display the search results page, the search engine must perform the same information subdivision on the Data. From the very beginning, spider added an information classification function, however, when the information classification reaches the level of 10 million, the whole process of information capturing and classifying becomes lengthy and slow. The most fundamental solution is to define a category for the server before the spider crawls. That is, a specific spider server only captures the information of a certain type, so that the classification becomes simple and fast. How does a spider define its own crawling path before capturing it? We can establish such a working model.

This process is easy to understand. It is the most important thing for us and also the most important link to be aware of, that is, path filtering. How is Spider filtered? When a model cannot be tested, the logic of a model should be considered. In this case, we should first determine two or more self-explanatory truths in the model, then, logical derivation is performed based on these two theorems. We need to first determine the principle first: to ensure the overall operation efficiency. Second, ensure that the captured content matches the category.

In this way, we can imagine the working principle through logical derivation: Pan crawling the paths captured by Spider through analysis (the analysis process is similar to finding the shortest path between nodes on the router ). The analysis will produce a crawling path composed of links. The page information captured in the path belongs to the same category, and then the optimal path is obtained by calculating the path length, finally, after filtering the optimal paths, submit them to the spider server for the specific crawling. Then, the spider server for the specific crawling can quickly crawl and classify the paths, the next time the pan-crawling server updates the optimal path, it crawls the path.

For example, if red and green apples are evenly distributed in a garden, fruit farmers now need to pick and sell them by red and green apples. At first, the fruit farmers picked all the apples in order and then packed them in different categories. Later, in order to improve efficiency, the fruit farmers began to draw fruit trees on paper, connect all the green apple trees with lines, and connect the red apple trees with lines, then, two groups of people are divided into two groups to pick up based on two different routes. After the collection, packages are sold directly.

So what external chain policies can we make after learning about this screening mechanism?
1. links. The pages of external links are related to the content of your website.
2. The vast majority of exported links to the pages of the external links also need to be related to their own websites.
3. avoid switching with websites with a large number of external links (just like if one room has only one exit, you can quickly determine how to exit, but one room has hundreds of exits, it takes a long time for you to know where these exits are going, greatly reducing the efficiency of spider)
4. Avoid and link a large number of external websites that are irrelevant to the website.
5. Don't let your website have no exported link. If there is no external link, you 'd better link to a website with a higher weight than not exporting a link, which is more popular with spider.

The above may be some of the most basic conclusions. Based on this filtering rule, we can even create a path that allows the spider to crawl cyclically and provide it to the search engine. The form of this circular path is the connection theory model that is increasingly used by everyone, the external chain is formed into a ring with the same content, so that spider can continuously crawl all websites on the path to increase the weight of the website on the path.

Of course, through such a conclusion model, a creative Seo can also create various optimization methods. here we need to think about it by ourselves.