You can use === also for matching values, but for this exercise please use ==.
Here is the correct code:
let signal = "yellow";
// write logic here
if(signal == 'green'){
console.log('Go');
} else if(signal == 'yellow'){
console.log('Wait');
} else if(signal == 'red'){
console.log('Stop');
} else{
console.log('Error');
}
