The ternary operator in JavaScript is specified using a condition followed by a question mark and semi-colon (condition ? :). It shortens the decision-making process into a single line, consisting of a condition followed by two statements which are separated by a colon. If the condition is true, the expression after the question mark will be executed. Otherwise, the expression after the colon will be executed. This ternary operator enhances the code readability and reduces verbosity in those cases where simple choices are involved. It can be used as an alternative to the if-else statements in JavaScript.

Syntax:

condition expression ? statement1 : statement2;