As Buck Woody notes here, when you are exploring a new data set it can be useful calculate some basic descriptive statistics. One new M function that appeared in Power BI recently can help you to do this: Table.Profile(). This function takes a value of type table and returns a table that displays, for each column in the original table, the minimum, maximum, average, standard deviation, count of values, count of null values and count of distinct values (but no mode or median?).