Magneto-Optical Kerr Effect (MOKE) is the rotation of the polarization of the light reflected from the ferromagbetic material (thin films and bulk crystals) kept in the magnetic filed.

Faraday rotation is the rotation of the polarization of the light transmitted through the ferromagnetic material kept in the magnetic field.

MOKE: Measured in the reflection geometry.

Faraday Effect: Measured in the transmission geometry