Guerrilla Marketing: what it's all about

Our group's work for the project will involve an extensive research on guerrilla marketing and what it's all about.

The way http://www.bootstrappingblog.com defines it, guerrilla marketing is:
"Guerrilla Marketing is a way to showcase your business or product in unconventional methods that often times cost little-to-no money."

To have a clear visual idea of what it's all about, you can follow this link and see some popular and successful examples for yourselves here:
http://www.bootstrappingblog.com/10-great-guerrilla-marketing-examples/