Google Rich Snippets

or search frequently asked questions:

What product types are supported by this Rich Snippets extension?
Can I add rich snippets to my home page?
Can I add rich snippets to category pages?
How long should I wait for rich snippets to appear in Google?
How does this Rich Snippets module work with configurable products?
Is this Rich snippets extension compatible with a multi-store configuration?
Will this module add rich snippets to already existing products?
Does this module add rich snippets to all products at once?
Does it work with Yotpo reviews?
I’ve enabled the Search Box markup but it still won’t show up in Google. Why?