rel="author" tags

HTML tags with a rel="author" attribute can be used to identify the author of an article, blog post or other online document. Advantages of adding rel="author" links include:

the author's profile photo may appear in Google search engine results
a search engine may increase the page rank based on credibility of the author

The rel="author" attribute can be used in three different ways:

as <link rel="author"/> in the meta data of the <head> section
as a <a rel="author"> link to the author's page on the same domain
as a <a rel="author"> link to the author's profile somewhere such as on Google+ or another social site, or

<link rel="author"/> meta tag

Example:

<head>
   <link rel="author"
      href="https://plus.google.com/112416945907493718478/about"
      title="Robert Scoble on Google+"/>
</head>

<a rel="author"> link to author's page

Example:

<p>by <a rel="author"
   href="/author/arthur-conan-doyle.html">Arthur Conan Doyle</a></p>

<a rel="author"> link to author's profile

Example:

<p>by <a rel="author"
   href="https://plus.google.com/112416945907493718478/about"
   title="Robert Scoble on Google+"
>Robert Scoble on Google+
   <img
      src="http://www.google.com/images/icons/ui/gprofile_button-32.png"
      width="32" height="32">
</a></p>