WAI Definition (Checkpoint 13.2)
Provide metadata to add semantic information to pages and sites.
Metadata is information that describes the content of a page or a website, in a standardized format. The recommended metadata format for the website is the Dublin Core (see example below).
Good quality metadata improves usability of search facilities by providing useful and accurate keywords and descriptions of content and media types. The descriptions and summaries of page contents displayed in search results are often drawn from metadata which is inserted in web pages.
<meta name="dc.title" content="The United Nations Programme on Disabilities" />
<meta name="description" content="The United Nations Programme on Disabilities works to assist in the promotion of effective measures for prevention of disability, rehabilitation, and the realization of the goals of full participation of disabled persons in social life and development, and of equality." />
<meta name="dc.subject" content="disability, accessibility, enable, persons with disabilities, rehabilitation, prevention, handicap, human rights, convention, international day of disabled persons" />
<meta name="dc.publisher" content="United Nations" />
<meta name="dc.format" content="text/html" />
<meta name="dc.language" content="EN" />
<meta name="dc.rights" content=" United Nations" />
Using the Firefox Web Developer's Toolbar (plugin):
Go to Information > View Metatags information.
Relevant metadata should be provided. It is specific and accurately describes the content of the page / site.