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.
Using <meta> to provide a short description about the document.
<head>
<meta name = "description"
content = "This section is an example answer.” />
</head>
Using <meta> to give the information about the last updated document.
<head>
<meta name = "revised detail"
content = "last updated time"/>
</head>
<meta>
<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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