Google Rich Snippets Tester

https://search.google.com/test/rich-results?utm_campaign=devsite&utm_medium=jsonld&utm_source=product

https://developers.google.com/search/docs/data-types/product

Rich-Snippet (Sexy-Snippet) Generator

http://saney.com/tools/google-snippets-generator.html

UTF-8 Symbolie wie ☀ ☁ ☂ ☽ ★ ☎ ☢ ☑ ☒ ☯ ♠ ♥ ❤ ♦ ♨ etc.

http://saney.com/tools/symbols.html