GPS made farm planning, field mapping, tractor guidance, crop scouting, yield mapping, and also helped farmers be able to work in fields under poor visibility conditions.
It is important because it helps farmers manage land, seed, pesticides, and labor. It also minimizes waste costs and increases efficiency and crop yields.
GPS is also used for something called Geocaching. People go out and try to find little containers that can contain little prizes using GPS coordinates people who hid them left. It's become more popular recently as well. (There are a few hidden around Jackson)