Microformats are small snippets of HTML code that allow you to represent commonly published content in a standardized way so browsers and applications can do something with that information. Types of things that use microformatting include reviews, people, businesses, and events. Microformats have been around for over 5 years. When I first learned about them a couple of years ago, little did I realize how quickly they would catch on.
One very common microformat is "hcard" which is based on the old vcard format. This is the most popular microformat for people and organizations on the web. There are over 2 billion web pages that use the hcard. With a little semantic markup, you save your user from having to copy and paste for example a person's address. Instead, they choose from a number of tools to quickly update their address book and, even better, dial a number from their phone!
Now that the big guys like Google and Yahoo! have jumped on the "Microformat Train" to go one step further and index them, there's a flurry of excitement for companies that take the time and care to use them. In May 2009 Google announced a search results enhancement called "rich snippets" that extracts content from microformats hcard and hreview; and as of April 2010 their search engine also officially supports hrecipe and hcalendar microformats. Google also has a Rich Snippets Testing Tool that allows you to see Google search results for web pages that use microformats. The benefit? Well, for example, the Food Network uses the "hrecipe" microformat. Their search results now include ratings, cook and prep times which may prompt a user to click through.
Most web browsers provide support for microformats (either built-in or as plug-ins). While there is some mobile support, the hope is that as microformats evolve, more tools will be developed to use them. Strong advocates of microformats say that while they currently don't impact SEO, in the future they just might, especially since Google is encouraging rapid adoption. Skeptics, however say that the Google snippets to index microformats are still experimental and at a dead end. In any case, their continued evolution should prove to be interesting!
