For a full document on how to use SET, visit the SET user manual: https://github.com/trustedsec/social-engineer-toolkit/raw/master/readme/User_Manual.pdf
The Social-Engineer Toolkit is an open-source penetration testing framework designed for social engineering. SET has a number of custom attack vectors that allow you to make a believable attack quickly. SET is a product of TrustedSec, LLC – an information security consulting firm located in Cleveland, Ohio.