Unicode Text Styling: What "Fancy Fonts" on the Web Really Are

Type a sentence into any "aesthetic text" or "fancy text" generator online, and you get output like this: 𝓗𝓮𝓵𝓵𝓸 or ⓗⓔⓛⓛⓞ or Hełło. None of that is a font change. It is a Unicode trick, and it is