META tag is a tag of HTML HEAD auxiliary region, which is located in the head of the HTML document <HEAD> and tag <TITLE> tags, which provides information invisible to the user. meta tag is usually used to search engine robots definition of the theme pages, or user-defined cookie on the browser; it can be used to identify the author, set page format, tagging executive summary and keywords; you can also set the page so that it can you define the time interval to refresh themselves, and set up RASC content ratings, and so on.
name is a description of a web page corresponding to the Content (Web content), to facilitate the search engine robots, classification (currently almost all search engines use the online robot automatically find meta value to the classified pages).
value argument name (name = "") to specify the type of information provided. Some values are already defined. For example description (description), keyword (keywords), refresh (refresh) and so on. You can also specify any other value, such as: creationdate (creation date),
the Document ID (Document No.) and level (grade) and so on.
name specifies the actual content of the content. Such as: If the designated level (grade) for the value (value), Content may be beginner (primary), intermediate (middle), advanced (Advanced).
1, Keywords (keywords)
Note: a list of keywords to search engines provide
usage: <Meta name = "Keywords" Content = " keyword 1, keyword 2, keyword 3, keyword 4, ......">
Note : among the keywords with a comma "," separated. META usually use the designated search engine is used to improve the quality of search keywords. When several META elements subordinate language document provided information, the search engine will use the lang attribute to filter through the user's language priority reference to display search results. For example:
<Meta - name = "Kyewords" Lang = "EN" the Content = "Vacation, Greece, Sunshine">
<Meta - name = "Kyewords" Lang = "
Description: Description used to tell the search engine the main content of your website.
Usage: <Meta name = "Description" Content = " Description of your web page">
Note:
3, Robots (robot wizard)
Description: Robots used to tell search robots which pages to index, which does not require an index page. Content parameters are all, none, index, noindex, follow, nofollow. The default is all.
Usage: <Meta name = "Robots" Content = "All | None | Index | Noindex | Follow | Nofollow">
Note: Many search engines are released through the robot / spider search to log sites, these robot / spider is necessary to use meta Some characteristics of the element to determine how to log on.
all: the file will be retrieved, and the links on the page can be inquiries;
none: document will not be retrieved, and the links on the page can not be queried; (and "noindex, no follow"
Plays the same role) index: document will be retrieved; (let robot / spider log in)
the Follow: links on the page can be inquiries;
noindex: document will not be retrieved, but the links on the page can be inquiries; (let robot / spider Login)
nofollow: document will not be retrieved, links on the page can be inquiries. (Let robot / spider follow the connection of this page down explore find)
4, Author (Author)
Description: The mark of a web page or production team
Usage: <Meta name = "Author" Content = " Joe Smith, [email protected] ">
Note: Content can be: you or your production team's name, or Email
5, Copyright (copyright)
Note: copyright label
usage : <Meta name = "Copyright" Content = " all page belongs to Zerospace .All Rights Reserved">
Note:
. 6, Generator (editor)
Description: editor Description
usage: <Meta name = "Generator" Content = " PCDATA | FrontPage | ">
Note: Content =" you used the editor "
7, the After-revisit (Revisited)
Description:
usage: <META name =" revisit- after "CONTENT =" 7 days ">
Note:
