Special Characters for SEO

What are special characters for SEO?

This page is a sample page including various characters in the title description and keywords of a webpage.
The main goal is verifying if these characters are shown in search engines, like Google or Bing, and to figure out how the display looks like.
white-circle-with-two-dots
warning-sign
medium-black-circle
medium-white-circle
soccer-ball
checkmark
hamburger
arrow
©copyright
®trademark
universal-recycling-symbol
beamed-eighth-note
yin-yang
white-telephone
white-star
black-star
cloud
black-sun-with-rays
white-smiling-face
Some symbols can be found over here:
https://www.w3schools.com/charsets/ref_utf_symbols.asp

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