This document summarizes the key features of AirBnB, including discovering apartments and neighborhoods through photos, connecting with other users through social media, booking more inexpensive accommodations than hotels in desired locations and atmospheres, seeing reviews of owners from previous guests, and paying during booking with options like PayPal. It also notes AirBnB provides an alternative to hotels that allows discovering a city through staying in a local resident's apartment, and has grown significantly in popularity.