Anyone explain, please?

Tell us what’s happening:
I dont understand the meaning of par and strokes in golf. How many strokes makes a par?
Please elaborate…
So that I m able to solve this question I don’t wanna to take a hint or watch a video so kindly help me.

Your code so far

var names = ["Hole-in-one!", "Eagle", "Birdie", "Par", "Bogey", "Double Bogey", "Go Home!"];
function golfScore(par, strokes) {
// Only change code below this line

return "Change Me";
// Only change code above this line

golfScore(5, 4);

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Challenge: Golf Code

Link to the challenge:

You don’t need to know anything about golf! The challenge wants you to use this chart: