Common search engine Query command Daquan

Search engine (engine) means to collect information on the Internet according to certain strategies, to use specific computer programs, and to provide users with retrieval service after organizing and processing the information. From the user's point of view, the search engine provides a page containing the search box, input words in the search box, through the browser submitted to the search engine, the search engine will return to the user input information related to the list.

In the early days of Internet development, the classification directory of Web sites represented by Yahoo is very popular. Site Classification directory by the manual maintenance, selected excellent web site on the Internet, and briefly described, categorized into different directories. User query, through a layer of clicks to find the site they want to find. It is also known as a search engine, but it is not a search engine in the strictest sense.

In the Search engine classification section We mentioned the full text search engine from the site to extract information to build a Web database concept. The search engine's automatic information collection function is divided into two kinds. One is a regular search, that is, every once in a while (such as Google is usually 28 days), search engine actively sent "spider" Program, a certain IP address range of Internet stations to retrieve, once found a new site, it will automatically extract the site's information and Web site to join their own database.

The other is to submit web search, that is, the site owner actively to the search engine to submit the Web site, it in a certain period of time (2 days to several months) directed to your site sent "spider" Program, scan your site and the relevant information into the database, in case the user inquiries. As a result of the search engine indexing rules have changed a lot in recent years, unsolicited Web site does not guarantee your website access to the search engine database, so the best way is to get some external links, so that search engines have more opportunities to find you and automatically your site included.

When a user searches for information with a keyword, search engine will be in the database search, if found with the user requirements of the content of the site, then use a special algorithm-usually according to the page of the keyword matching degree, the position/frequency, link quality, etc.-to calculate the relevance of each page and ranking level, The links are then returned to the user in order, depending on the degree of relevance.

Search engine is the collection of information on the Internet, summed up, for everyone to provide convenient information query system, now search engine to become tens of millions of internet users must use one of the tools to facilitate the vast majority of life, learning, entertainment, how to better use the search engine, the following seoer edge listed some search commands, Let's use search engines better:

intitle command:

The meaning of intitle is to search the title of the page contains keywords, such as to search the title contains "it" content, search Intitle:it, will search the page title contains it keywords page.

The command:

"" The Meaning of the search contains keywords within the page, for example, to search the title contains "Baidu" content, search "Baidu", will search the page contains the keyword Baidu Web page.

Search Number Command

For example, to enter the search engine phone number, IP address, can be queried to the mobile phone number of the registered address, IP address.

Site command:

Site's meaning is to retrieve the set of Web site in search engines to capture the number of content, such as search "site:www.noseo.org.cn" can query to search engine Noseo How many pages of content.

+ Command and Domain command

+ command and domain command means to search the Web site in the search engine in the Reverse link page, for example, to search for what pages link to www.hao123.com page, you can enter domain:www.hao123.com or + www.hao123.com