Micro Data Markup for breadcrumbs.

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Gregory Kristan: Has anyone run an A.B test by adding Micro Data Markup to their breadcrumbs? If so did you see ;
  
  1) Impressions go up (for that page)
  2) Clicks to that page increase (more impressions or the same amount of impressions but a higher CTR)
  3) Keyword Ranking Improvements
  
  Thanks!
  
  -Greg
• 
  Toni Anicic: It's impossible to do an A/B test with such a feature. Google can at one point have only one version of your website indexed (with or without schema.org). That being said, one could do a "time test" and I've seen several such case studies, but their results are as relevant and scientifically accurate as anecdotal experience. ;
• 
  Gregory Kristan: +Toni Anicic ;that makes a ton of sense. Thanks for the reply!