The puzzle piece emoji shows a single interlocking jigsaw piece, with its color varying by platform. It represents puzzles, problem-solving, missing information, or one part of a larger whole.
People use it when something finally makes sense, when a clue is missing, or when two things fit together. It can describe a puzzling person or situation too. The symbol has also been associated with autism organizations, but many autistic people dislike that association, so it is better not to use it as a casual shorthand for autism.
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