Metadata is information about data. This meta tag
<meta> is used to provide information about HTML documents such as page description, author of the document, and keywords.
<meta> to provide a short description about the document.
<head> <meta name = "description" content = "This section is an example answer.” /> </head>
<meta> to give the information about the last updated document.
<head> <meta name = "revised detail" content = "last updated time"/> </head>
<head>element and doesn't affect the document's physical appearance.
For more information, see http://www.w3schools.com/tags/tag_meta.asp
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