This document summarizes the key features of AirBnB, including discovering apartments and neighborhoods through photos, exchanging with individuals rather than companies, booking more inexpensive accommodations than hotels where you can choose your location and atmosphere and see the neighborhood, owner reviews and grading, and paying during booking with options like PayPal. It also notes AirBnB as an alternative to hotels that allows discovering a city through someone's living space and has grown significantly in popularity.