003-common META tag notation and function

Page keywords
<meta name= "keywords" content= "your,tags"/>

Page description
<meta name= "description" content= "150words"/>

Search Engine Indexing method
<meta name= "Robots" content= "Index,follow"/>
<!--
All: The file will be retrieved and the link on the page can be queried;
None: The file will not be retrieved, and the link on the page cannot be queried;
Index: The document will be retrieved;
Follow: Links on the page can be queried;
NOINDEX: The document will not be retrieved;
Nofollow: Links on the page cannot be queried.
-

Page redirection and Refresh
<meta http-equiv= "Refresh" content= "0;url="/>

Prevent browsers from accessing page content from the local computer's cache
<meta http-equiv= "Pragma" content= "No-cache"/>

Restrict all search engines to build your web snapshots
<meta name= "Robots" content= "norchive"/>

003-common META tag notation and function