What causes urticaria: What is the essence of SEO?

Have a website and don’t know how to optimize it? Can’t find your information when searching on Baidu? You are very envious when you see other people’s websites optimized to the Baidu homepage. Why can’t your website get there? Why is that?

It's very simple, because you don't understand SEO. If you really understand what SEO is, would optimization be difficult? Not difficult! That’s no problem! ! !

SEO is the abbreviation of Search Engine Optimization, which means "search engine optimization" in Chinese. SEO refers to the process of adjusting and optimizing the website internally and externally to make the website meet the search engine ranking requirements, improve the keyword rankings in the search engines, thereby bringing accurate users to the website, obtaining free traffic, and generating direct sales or brand promotion.

I know you look confused after reading the theory, so let's talk about something practical. As shown in the picture above, when we are interested in something, we know to go to Baidu and search for "SEO training" on Baidu. In addition to thousands of pieces of information, you can see the "Baidu snapshot" in the red area in the picture, which is the result of SEO. In addition to SEO, there are many other ways of display. The most common one you see should be the information with the word "advertisement" on the homepage. We commonly call this information SEM, which will be explained to you when we study later. Now you know that if you search for information with the word "advertisement" on Baidu, you will know that it is the result of SEO optimization.

Now that we know how SEO is displayed, how do we optimize it? SEO is search engine optimization, so what exactly is a search engine? How to optimize it? Let’s take a look together below.

We all know that if we don’t understand something, go to Baidu. Yes, Baidu is a search engine. What else is there besides Baidu? Is Baidu enough? Of course not, there are many search engines, such as 360 Haosou, Sogou, Google GOOGLE, UC Search, Taobao, JD.com, etc. are all search engines.

All engines refer to systems that collect information from the Internet based on certain strategies and using specific computing programs, and after organizing and processing the information, provide retrieval services to users and display the relevant information retrieved by users to users.

We know what search engines are, but we don’t fully understand them just by looking at the theory. We also don’t know how to optimize our own websites even if we know the theory. If we want to optimize a website, do we have to know the working principles and working modes of search engines? Knowing how it works, we can optimize the website according to its rules. Once you understand how it works, optimization will not be so difficult.

From the picture, it can be seen that this is the working principle diagram of Baidu search engine. Let's explain its working principles one by one. First of all, we go to Baidu to search for a keyword, and Baidu will show us the corresponding search results. These displayed results come from the work he did in the early stage, which is the process of Baidu crawling, processing and displaying. Crawling means crawling our website pages (that is, our own website) through Baidu spiders, and then storing them in Baidu's own database.

Here comes a name Baidu spider. Baidu Spider is a program that can crawl various website pages and store the information of these websites (we call it data) into its own database.

After Baidu stores the captured data into the database, it needs to classify and rank the data. After the data is classified, it will be stored in the index database. When a user searches for a keyword, the pre-processed data will be displayed to our users. The display format is generally Baidu snapshot, which is the SEO display result mentioned in the previous article.

①Crawling: What we can do is to let the spider crawl to our website page. Since the purpose is to attract the spider to our website, we should give it what the spider likes, and he will naturally come to our website. What do spiders like? (Our later article will tell you).

② Crawl: When the spider comes to the website, it starts the crawling process. The spider will read all kinds of information on our website. The spider will read everything you have. Then he grabs whatever he likes and takes it away. At this time, what we can do is to show high-quality content to spiders. If there is some information that spiders cannot see, we can set it up to hide it so that spiders cannot see it. How to hide? (The following article will tell us).

Preprocessing is to classify and rank the captured content. How to classify? How to rank? (The next article tells us how Baidu performs preprocessing).

After the preprocessing is completed, Baidu will store the processed data in another database of its own, the index database. When a user searches for a keyword through the Baidu search engine, the contents of the index database (pre-processed data) will be displayed to the user.

Make your website pages attractive enough to spiders, then let spiders crawl the content you want to display, and block the content you don’t want to display so that spiders can’t see it. Then, according to Baidu's preprocessing rules, follow Baidu's rules to make your website page good enough so that the website has a good ranking. Finally, when users search for a keyword through the search engine, they can see our own website~