In Titanfall a Pilot is an elite soldier and operator of a Titan. Pilots have superior skills and equipment compared to the standared soldier. When a Pilot is operating a Titan they will be able to maneuver and fight as though they were on foot, this is because the Titan has been designed to be an extension of the Pilot's body. Pilots are worth several normal troops and if you use them to capture Hardpoints will give you some bonus effects. Each of the different Pilots has a rank and their abilities are unique.
Pilots in Titanfall: Assault
Arc Bruiser
Boomer (Arc Boomer)
Ghost
Grenadier (Holo Grenadier)
Grunt Capt.
Gunner
Pyro Bruiser
Sentry Tech
Sim Ninja
Sniper (Charge Sniper)
Stim Bruiser
Spectre Capt.
Striker
The video below will show how to use Pilots correctly on the battlefield.