Technical Term
Variation Selector (VS16)
An invisible character (U+FE0F) that tells the system to display a character as an emoji rather than a black-and-white symbol.
In-depth Analysis
Variation Selector-16 (VS16) is essential for characters that have both a text-style and an emoji-style representation (like the heart symbol ❤️ or various arrows). Without VS16, these characters might render as simple monochrome glyphs. For developers, correctly handling VS16 is key for visual consistency.