A grapheme is a unit of Unicode text. In other words, it's the smallest unit of text that can be used to represent a letter or a character. It's like a single emoji, but not actually an emoji. Confusing, right?
A grapheme is a unit of text that represents a specific character in a language, like a letter or a digit. It's a fundamental unit of writing, like a LEGO brick, but, you know, not actually a LEGO brick.
A grapheme is a unit of text that represents a specific idea or concept. Like, have you ever tried to explain the difference between a grapheme and a character? Good luck with that.