The document explains the concept of reservations in the hotel industry, detailing their importance for both hotels and guests, and describes various types of reservations such as tentative, waitlisted, confirmed, guaranteed, and non-guaranteed. It outlines different modes and sources of making reservations, including direct and online methods, and the systems used to process them, which can be manual or automatic. The document also touches on specific reservation methods employed by hotels and explains management procedures for handling reservation requests.