How the search engine works

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Before we step into the search engine optimization, perhaps the first thing we want to know is about how the search engine works.

When you have a preliminary understanding of the search engine work of the general flow and mechanism, you learn SEO ideas will be more clear. Master SEO technology will also be more rapid.

All right. Don't say much nonsense.

Let's take a look at how the search engine works.

Let's take Google as an example.

In fact, the work of the search engine is as follows:

(See how the search engine works on the right side of the picture shown above)

After looking at the picture above actually basically we all understand. If you do not understand, please continue to read the following:

First of all: it is the searcher on the search engine to knock down the key words.

For example: SEO Club

The upper-left part of the picture above:

The first step is to match the search request. It is said that they will enter the user input keywords, such as what the SEO club, called "Search term."

Once the user entered the search term and then hit the return, the search engine began to analyze the search request-----Check search engine request each search term, and will do a lot of seoer tense things: Put which page first, second, third ...

And what is the basis for analysis may be different search engines vary or have a focus. But this step is basically the same.

For example this period will have (the following things are more abstruse and cumbersome, not one detailed explanation):

Find the variant of the word and correct the spelling: find the phrase, not the phrase and stop the word (like English, the same quantifier, but there are plural and singular, the search engine will be based on these inconsiderable information to make different judgments; You can try to enter in the search engine: "For music department", Google will ask you: "You are not looking for: the club!" Yes, the club is just what I'm looking for.

Then you go to the right part of the diagram above, and in the process of matching search requests to the analysis search request, the following steps are processed:

A: Check phrases, not phrases and stop words:

Check the phrases and the non phrases. That is, when a searcher enters a search request, the search engine makes an analysis and makes a filter. Filter out a phrase that is considered to be a word, and then decide which phrases to search for as keywords, and then display the most appropriate page sort for each page of analysis.

For example, when we search for "a green tea", it is likely that "one" will be judged as a non phrase.

In addition, like a, one, one, these words, search engines generally do not search for them, known as "Stop word." For Chinese, we usually use these words to name the product. So there is hardly any word to deal with these words. However, in English Ken will appear more. The 2¥q "

B: Check the word order:

For example, when we search for "site optimization" and "optimize the site", the results are generally different, this is because the search engine in the ranking will also take into account the word order problem.

C: Processing search operator symbols

For example, "+-".

We searched for the White House. English: "The Whites House" but in that case, the search engine might have omitted the word "stop" so that it would show some information that we didn't want, such as the description of white houses.

So we can do a precise search of +the White House, so that we can make sure that the top of the page is all about the information pages.

Another example: we want to search for Seoclub (it's a website that provides SEO information), but there's also a Seoclub TV (it's a TV station that speaks search engine optimization), and if we want to omit the information about the station in the search results, And only the information related to Seoclub is displayed at the front. We can write this: SEOCLUB–TV

For a search engine marketer, knowing these can avoid naming a product or site with names that appear with other words (that is, you need to add something like "+-" to search)

(In fact, these are often seoer as a filtering technique they use when looking for information)

Then came the search for the library, which is the next step.

Step Two: Select the structure that matches the search engine request

When we read the above steps, it's easier to understand when we get there. Just a matching search result, there is also a paid search results in. Here we go, we only talk about natural search.

A: Select the results of a natural search match

The natural search engine uses the search index library to locate the most matching pages. Basically, by analyzing a search request, you decide what word to look for-------not only those words typed in the search request, but all variants of the word (such as this and these, or woman and women), and which words are ignored ( Stop words and not phrases). Search engines look at each word in the search request and see which pages contain the words.

Search Primer Socou can be viewed as an alphabetical list (more commonly, it is like a word sea or an encyclopedia that can be read--how to understand the concept most commonly: what is SEO--and list every word on the Internet page (refer to the chart below):

How the search engine is being found in the index library. Natural search Engines Check the index of the list of pages, and the list lists all the pages that contain each word in the search engine request.

The above is just one of the simplest examples.

In fact, searchers are often not so single to search for a problem. For example, he will not search the food festival, may be Guangzhou Food Festival, Shanghai Food Festival and so on. Therefore, the search engine must do various analysis judgment. First you will find all the pages containing the keyword, and give a list of the pages containing "Guangzhou" and "Food Festival". Most search engines, when confronted with this situation, first display pages that contain both "Guangzhou" and "Food festivals" or "Shanghai" and "food festivals".

In another case, there is a longer sentence. For example, "Guangzhou Food Festival on which day", obviously, food festival, will be the key words in this keyword, so, some only contain food section of the page is likely to appear in front.

A commentary on how search engines work. That's it. In fact, the complexity of search engine work is not so clear at the moment, and we cannot fully understand it.

This draft by the SEO club to provide webmaster stations, such as without the consent of the site, reproduced must be written to indicate the source and link.

Article Source: http://www.seoclub.net/seo/seo_se.html