Using Microdata to Improve Click Through Rates in Google
Google doesn’t use Microdata markup for ranking purposes at this time, but rich snippets can make your web pages appear more prominently in search results, so you may see an increase in traffic.
Using Microdata Markup to improve local search
Profile Images in Google Results Pages
Review Stars in Google Results
Jump links in Google
V1 SEO Jump Link tips used for displaying Jump Links in the SERPs
Jump links or jump to links have been appearing in the Google results pages for some time now, these jump link tips shows you how to obtain them in your results – How to get jump links showing in Google