Sort order is help full to manage sequence of product, as per your requirement.

By default product list show in “alphabettical `1order”, but if you have some products which important and want to show first, then sort order is usefull for you.

EX:
Below is product and its sort order

Broccoli – 3
Collard greens 1
Rice 8

if configuration is on(as given in screenshot), then product list will show according to sort order no. Assign to product as below:

Collard greens 1
Broccoli – 3
Rice 8