1, Keywords (Web key word)
How:<Meta name= "keywords" content = "This page is written in key fields and is conducive to search engine optimization" >
What is the key content field that explains this page to the search engine?
2,Description (Web content description)
How:<Meta name= "description" content = "Search engine optimization related" />
What is the key to explaining this page to the search engine?
3,Robots ( index method of search engine crawler )
How:<Meta name= "Robots" content= "all| none| Index| Noindex| follow| Nofollow ">
What:robots is used to tell the search robot that the page needs no index. The default is all.
||The file will be retrieved and the link on the page can be queried
||The file will not be retrieved and the link on the page cannot be queried; (and "Noindex, no follow" play the same role)
||files will be retrieved; (Let Robot/spider log in)
||Links on the page can be queried;
||The file will not be retrieved, but the link on the page can be queried; (Do not let Robot/spider log in)
||The file will not be retrieved and the link on the page can be queried. (Do not let the Robot/spider follow this page to look down)
4. Viewport ( Mobile Side Windows Settings)
How:<Meta name= "Viewport" content= "Width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0 ">
What: Make a Web page fit or respond to a variety of different resolution mobile devices.
|| Set the width of the Web page to a positive integer, or the string" Width-device "(range from 200 to 10,000, default to 980 pixels)
|| Set the initial zoom value of the page, as a number, with decimals (range from > 0 to ten)
|| allows the user's minimum zoom value to be a number, with decimal
|| Allows the user's maximum zoom value, as a number , you can bring decimal
| Set the height of the page, rarely used (range from 223 to
| Whether the user is allowed to scale, the value is" no "or" yes ", no is not allowed, yes means allow
5, Format-detection (format read)
How :<Meta name= "format-detection" content= "email=no| Telephone=no|adress=no " />
What: whether to verify the format (yes/no), whether to prohibit triggering as an email address | Is it forbidden to convert a number to a dial-up link | Do you want to stop jumping to the map
6, Apple-mobile-web-app-status-bar-style (change the color of the top status bar)
How:<Meta name= "Apple-mobile-web-app-status-bar-style" content = color value " />
What : Set the color of the status bar (the top bar of the screen) in the Web App app , default to the defaults (white), Black (black) and black-translucent (Gray translucent)
7. Apple-mobile-web-app-capable (web App support is opened on the website)
How:<Meta name= "apple-mobile-web-app-capable" content= " Yes " />
What: Apple device: Web App support for website launch
8. Author (author)
How:<Meta name= "Author " content= "code Farm">
What: Label the author or production group of a Web page
9. Copyright (Copyrights)
How:<Meta name= "Copyright" content= "Copyright of this website is owned by the blog Park" >
WHAT: Label copyright
How:< meta name =" renderer " content = "WebKit | ie-comp | ie-stand" > /span>
what: represented by Webki t core, IE compatible kernel, IE standard kernel, case sensitive
< Span class= "hljs-attr" >
|| ie compatible
|| ie standard
| kernel version
|| chrome Td>
|| ie9/ie10/ie11 (depending on the user's IE)
| HTML5 support
| activex control support
11. revisit-after (search engine crawler re-visit time)
How:<Meta name= "Revisit-after" content= "2 Days " >
What: If the page is not updated frequently, in order to alleviate the search engine crawler to the server pressure, can set a crawler's revisit time. If the revisit time is too short, the crawler will be accessed by the default time they define.
Second, HTTP header information Http-equiv class:
1. Content-type (setting of web character set)
how : < meta http-equiv = "Content-type" Content = "text/html; Charset=utf-8 " />
//old HTML, not recommended;
< meta charset Span style= "COLOR: #0000ff" >= "Utf-8" >
Span class= "hljs-built_in" >//new HTML5 mode recommended
What: Set of character sets and encoding format for rendering
2, X-ua-compatible (the browser to take what version to render the current page)
How:<Meta http-equiv= "x-ua-compatible" content= "Ie=edge , chrome=1 "/>
What: Used to tell the browser which version to render the page in.
3. Refresh(automatically refreshes and points to a page)
How:<Meta http-equiv= "Refresh" content= "10; Url=https://i.cnblogs.com ">
What: the webpage will automatically refresh and adjust to the set URL within the set time.
4,expires (page expiry time)
How:<Meta http-equiv= "Expires" content= "Sunday October 01:00 GMT " />
What: Used to set the expiration time of the webpage, after which the webpage must be retransmitted to the server.
5.Set-cookie (Cookie setting)
How:<Meta http-equiv= "Set-cookie" content= "Cookiename= Cookievalue; Expires=fri, 12:00:00 GMT; path=/">
What: Create a cookie that contains the cookie name, cookie value, and expiration time.
6, Cache-control (Specify the caching mechanism that requests and responses follow)
How:<Meta http-equiv= "Cache-control" content= "No-cache" >
What: Controls the caching mechanism of the document.
||All content will be cached (both client and proxy servers can be cached)
||Content is cached only in the private cache (clients can cache only, proxy servers are not cacheable)
||Do not cache
||Cache when not archived but not archived
Meta tags common Properties and introduction