If I understand her correctly, you can use itempropwithout itemtype. It's true?
If so, what is the difference in terms of SEO? Is it better to use it with itemtype? I suppose yes, obviously, but what if Microdata is not equal to the site you have? For example, I have a dictionary and I could use a book, but would that be good? I don’t know how Google will see it. It would be nice to get a penalty due to poor use.
So: Should I use schema.org schemas?
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