Search engines rely heavily on page keywords and meta descriptions to rank your web site. SharePoint 2013 helps you make your site pages SEO friendly, by providing an out-of-the-box mechanism to output your meta keywords and description. 

Enabling Keywords and Meta Descriptions

On his blog, Yaroslav Pentsarskyy shared an interesting 5-step method to Enable Keywords & Meta Descriptions on Pages.

"When content authors create or edit and existing page, they can specify meta keywords for that page right there and then. Assuming you have a site of publishing site template,

  1. As a site collection administrator, navigate to the Site settings -> Site collection features
  2. Activate Search Engine Sitemap feature
  3. Navigate to an existing or a new page and enter its edit mode
  4. From the Page ribbon tab, click on the Edit Properties fly-out and select Edit SEO Properties
  5. Check additional settings
    1. Browser title
    2. Keywords
    3. Exclude from internet Search engines"
Fields are rendered on the page, using the following meta tags.

<meta name="description" content="Sunny's meta description" />
<meta name="keywords" content="Sunny's keywords" />

See Also

An important place to find a huge amount of SharePoint related articles is the TechNet Wiki itself. The best entry point is SharePoint Resources on the TechNet Wiki