DO MORE with Joomla 3.3! With this version of the Joomla 3 software your website is better equipped to communicate with search engines semantically. You may or may not have heard of the term semantic search. Erin Everhart's Mashable article defines what it is quite nicely. But in a nutshell Google will be using this type of search to try to better determine how your search terms fit together to give you more accurate search results.
So how does the information needed get into your website so semantic search will work for you? Microdata is found within your HTML markup that is created each time you go to a page. The graphical page you see when browsing a website has a geeky back side that is only seen by the search engines. For example if you use breadcrumbs on your website, they will be marked as such and shown in search results pages to help give a better visual representation of the topics on your website. Version 3.3 provides this allowing you to take advantage with search engines that use this.