Just noticed this and wondering what is the best method in fixing this problem.

 

a replacement seat (or seat upper if you're feeling handy)

 

Take it to an auto upholstery shop. The pros can work wonders with stuff like this.

 

I can't tell from the photo if the material is damaged, or just scuffed.

If it is scuffed than a medium strength All Purpose Cleaner and a quality interior brush and microfiber towel should be able to remove the markings. After I recommend protecting the seats with Meguiars Quik Detailer which will create somewhat of a barrier for future scuffs.

If it is actually torn, than you will need to replace that portion of the seat. As said, and auto upholstery professional may be able to fill in the tear, with near perfect color matching ability, and they can also remove scuffs and such if you don't feel like doing it yourself.