A Free package does not provide any advertising power except the organic discovery. The listing has a limited amount of features.
The "Basic" Package Advertising targets your home city only. The listing has more features than a Free Package.
The "Deluxe" Package targets cities, metros, counties in your home state/province or state/province of your choice. The listing has more features than a Basic Package.
The "Platinum" package targets cities, states, metros, counties across USA/Canada. The listing has more features than a Deluxe Package.
Please review more detailed info on the Showmelocal advertising packages page.