Mean, median, and mode are different measures of center in a numerical data set. They each try to summarize a dataset with a single number to represent a "typical" data point from the dataset.
Mean: The "average" number; found by adding all data points and dividing by the number of data points.
Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are two middle numbers, taking the mean of those two numbers).
Mode: The most frequent number—that is, the number that occurs the highest number of times.