More from Logan's article, which I think should be mentioned:
The mats aren’t used on every fairway shot on every hole. They are mostly brought out for second shots on the course’s shorter par 4s (No. 1, 7, 8, 10), where most players hit wedge or another divot-gouging short iron into the green.
The mats also aren’t used in the rough, or on the fringes of the fairways. The idea is to protect the prime landing areas of the fairways.