The secret of META tag

META tag is an auxiliary tag in the head area of ​​HTML language. In almost all pages, we can see html code similar to the following:

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This is a typical use of meta tags. How many parameters does the meta tag have, what is its function, and why should we pay special attention to it? Let’s discover the mystery of meta tags together!

According to HTML language standards: The meta tag is a very important tag for website development. It can be used to identify the author,
set the page format, mark the content summary and keywords, and Refresh the page and so on.

The meta tag is divided into two parts: HTTP-EQUIV and NAME variables.

●HTTP-EQUIV is similar to the HTTP header protocol. It responds to the browser with some useful information to help display web page content correctly and accurately
. Commonly used HTTP-EQUIV types are:

1.expires(period)
Description: Can be used to set the expiration time of the web page. Once a web page expires, it must be retrieved from the server.
Usage:
Note: The time format of GMT must be used.

2.PRagma (cach mode)
Description: Prohibit the browser from accessing page content from the local machine’s cache.
Usage:
Note: With this setting, visitors will not be able to browse offline.

3.Refresh
Instructions: If you need to automatically link web pages to other web pages at regular intervals, use this sentence.
Usage:
Note: The 5 refers to automatically refreshing to the URL after staying for 5 seconds .

4.Set-Cookie (cookie setting)
Note: If the web page expires, the saved cookies will be deleted.
Usage:
Note: Must be used GMT time format.

5.Window-target (display window setting)
Description: Force the page to be displayed as an independent page in the current window.
Usage:
Note: Used to prevent others from calling your page in the frame.

5.Content-Type (display character set setting)
Description: Set the character set used by the page. (We have already introduced its role in the previous font design)
Usage:


●NAME of the meat tag The variable syntax format is:

where xxx mainly has the following parameters:

1.KeyWords (keywords)
Explanation: keywords are used to tell search engines you What are the keywords of the web page?
Example:

2.description (Introduction)
Instructions: description is used to tell the search Engine the main content of your website.
Example:

3.robots (Robot Guide)
Description: robots are used to tell Which pages need to be indexed by the search robot and which pages do not need to be indexed.
CONTENT parameters include all, none, index, noindex, follow, nofollow. The default is all.
Example:

4.author(author)
Instructions: Mark the author of the webpage
Example:

The above are some basic usages of meta tags, the most important of which are: Keywords and description settings.

Why? The reason is very simple. These two statements can allow search engines to accurately discover you and attract more people to visit your site!

According to the working principle of popular search engines (Lycos, AltaVista, etc.), search engines first send The robot automatically searches on www. When it finds a new website, it retrieves the keywords and descriptions in the page, adds them to its own database, and then sorts the websites according to the density of the keywords.

In other words:
1. If there are no meta tags of Keywords and description in your page, then the robot will not be able to add your site to the database, and it will be impossible for netizens to search for your site.

2. If your keywords are not well chosen and the density of the keywords is not high, the possibility of being ranked behind dozens or even millions of sites is also very small.

Therefore, we must remember to add meta tags of keywords and description, and write keywords and introductions as well as possible.

Taboos when writing keywords are:
1. Don’t use common words. For example www, homepage, net, web, etc.
2. Don’t use adjectives or adverbs. For example best, biggest etc.
3. Don’t use general words, be as precise as possible. For example, instead of using "Motorola Mobile Phone", use "V998", etc. One trick to find suitable keywords is: go to search engines such as lycos, Alta, infoseek, etc., search for websites with similar content to yours, and check the top ten Copy the meta keywords of the website and use them on your own site.

Here, we give you a keyword from Microsoft Multimedia website for your reference:


The above are the META tags Wonderful content, please pay attention to the PHP Chinese website (www.php.cn) for more related articles!