A Commercial Pilot's license allows a pilot to carry cargo or passengers for compensation or for hire. The FAA standards of required knowledge and flight experience are much higher for a Commercial Pilot's license.
Commercial Pilot Requirements
Minimum 18 years old
Hold a Private pilot license
Must read, write, speak and understand the English language
Minimum of 150 hours of flight time
Hold a current FAA medical certificate
Pass an FAA written Commercial knowledge test
Minimum of 100 hours of PIC time with at least 35 hours PIC in helicopters