Under Areas you can see area of all your elements from the course. You are able to see a circle diagram for each of your courses and for the total areas. So if you have a 18 hole course and a 9 hole course. You will be able to see how big your areas are only on the 9 hole course.
You can enable and disable the different elements and for each course. So you can see the change in total if you disable e.g. high rough or you can only enable fairway to see how much fairway area you have. In the different tables you can see a count for each element that's how many elements you have on the club or the specific course.
At last you can switch the area unit between hectare (ha) and square meters (m2) whichever you prefer.