Feedback/Suggestions on JS Basics Quiz

Look's really solid to me, easy to understand and you have helpful comments throughout. If you were going to refactor, I see some opportunities to make your code more dry by creating a helper function for your if/else statements that test if the correct answer was given, increment your scoreKeeper variable, and alert the user that on whether or not they were correct.

if (q1.toLowerCase() === answers[0]) {
  scoreKeeper++;
  alert(`Congrats, you got it right! It was ${answers[0]}`);
} else {
  alert(`No I'm sorry, it was ${answers[0]}`);
}
//fast forwarded
if (q5.toLowerCase() === answers[4]) {
  scoreKeeper++;
  alert(`Congrats, you got it right! It was ${answers[4]}`);
} else {
  alert(`No I'm sorry, it was ${answers[4]}`);
}

I'm sure you see it already, but each of these conditionals follows the same pattern. The only thing that changes is the question variable in the conditional (q1-q5) and then index in answers (answers[0]-answers[4]).

So if you can devise a function where you pass in the question number and index number, you only need to write that code block once, and just call the function, whilst passing in the appropriate arguments.

If you want to see my swing at such a function, click here. After that is out of the way, another pattern becomes visible in the question prompt, function call repetition, so you could go even further with it, but just by creating that helper function, we saved a lot of lines of code.