Median is the middle number of a set of numbers. if u come across this:
12, 14, 27, 34, 36, 93, you would take the two numbers in the middle, add them, then divide them by the amount of numbers in the set. if you come across this: 43, 85, 91, 105, 107, you can see that the middle number is 91. Hope my examples helped:)