No, it's an economy shipping service.
Yes it is. It is faster.
Ups doesn't have first class or priority. That's the USPS (united states postal service or post office for short). First class and priority are pretty much the same service but first class has a maximum weight of 13ozs. So a package has to go priority in order to get there in 2-3 days.
first class 1-2 days to 7 days
UPS ground 4 days priority or first class 3, parcel post 2 weeks
The SCAC code for UPS Ground is UPGF.
UPSG
UPS Ground is the most cost efficient of the two but standard is significantly faster
ups ground are trucks and deliver faster and cheaper if its close by and ups express delivers the same but Saturday and Sunday
Estimated delivery time for First Class mail is 2-3 days.
3 days ! (ups ground)
United Parcel Service
UPSG