RDFa or Resource Description Framework – in – attributes is basically a way to code your website content in order to have it make sense to the search engines. When a bot crawls your page, it doesn’t really know what the content means.
With RDFa, your content can now make sense to the bots which will make your site more searchable. The following infographic by MIND Development and Design shows why incorporating RDFa into your web site is becoming more important.
[Click image for full size version]