What is the circle or marked off area in front of the goal in lacrosse?

The goal circle, or "crease" allows attackers to have an advantage to see the field or make a "roll." A player behind the goal can make feeds to offensive cutters, and if the opportunity is there, to run around the perimeter of the circle and score a goal. It is a good way to shake defenders and to use your teammates to set picks and make cuts so you can score a goal.

It's probably one of my favorite parts about attacking in the sport.