What does "JS - Uncaught SyntaxError: Invalid or unexpected token" signify?

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"JS - Uncaught SyntaxError: Invalid or unexpected token" is a JavaScript error message that indicates that there is a problem with the syntax of the code, and that the interpreter has encountered an unexpected character or token. This error often occurs when there is a missing or misplaced character, such as a missing semicolon, or an extra comma, or perhaps an unexpected character that doesn't belong in the code. It can also be caused by a problem with the encoding or formatting of the code.