I did mention about the use of both schema tags and Facebook OpenGraph tags in my first reply. You are referring to microdata types i.e.:itemscope , itemtype and itemprop, which I already explained in my tutorial here:
The new blogger templates have them added by default and you can also add them to enclose your post body in it but I don’t find it quite useful because search engines today are way mature and can recognize a blog post. The best you can is to add itemtype for Person.
In the structured data errors post we used the microdata about blog author “Person”
<span class='post-author vcard' itemscope='itemscope' itemtype='http://schema.org/Person'>
This is one popular use of microdata in blogger to produce rich snippets in search results
There are many semantic markup described in http://schema.org. Search engines rely on these markups to improve the display of search results. microdata can be used differently based on a site’s structure. For example if you are running a movie blog with movie reviews, you will apply itemtype movie
<div itemscope itemtype="http://schema.org/Movie">
Similarly you will use different item types for books, Recipe and TV serries etc.
How Schema tags effect Search Results?
This is the output of that slight change you make in HTML
Some commonly used item types:
- Book, Movie, MusicRecording, Recipe, TVSeries
- AudioObject, ImageObject, VideoObject
Person - used in blogs MUST!
- Place, LocalBusiness, Restaurant
- Product, Offer, AggregateOffer
- Review, AggregateRating
Hope that clarifies things for you. For blogger, we have already shared the tutorial which you can apply to you blog