This is emblematic of the laziness of today’s youth. And if you’re not young, it’s still a great example. Why do you need someone to tell you what it means? Look it up!
Here, I did the hard work for you.
Average:
Wikipedia: An average, or central tendency [1] of a data set refers to a measure of the “middle” or “expected” value of the data set.
Merriam-Webster: A single value (as a mean, mode, or median) that summarizes or represents the general significance of a set of unequal values.
I’ll leave “normal” as an exercise for the reader.