What Are Microformats?
Microformats are pretty interesting if you give them a chance. While they aren’t a component of the W3C HTML spec, they do offer a valuable and useful set of naming conventions (using class, id, rel and rev attribute values) that identify points of interest on the page, such as calendar events, links to the content’s license agreement, and even quirky things such as cooking recipes.
While microformats are not a W3C standard yet–though many microformats either have been recommended to the W3C as standards or are in draft form–the level of support browsers and web services have for them explains their utility.
Simply put: microformats are worth learning about and implementing into the websites you build.
Read more: Six Revisions