Google says structured data gives it explicit clues about the meaning of a page, and that in general it recommends JSON-LD if your site setup allows it.
https://developers.google.com/search/docs/appearance/structured-data/intro-structured-dataThe full answer on Google rich snippets is here:
https://aiwebpageseo.com/blog/what-are-google-rich-snippetsWhich rich result types have you managed to get showing for your own pages, and which ones never appeared?
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