Backpacking is a term that has historically been used to denote a form of low-cost, independent international travel. Terms such as independent travel and/or budget travel are often used interchangeably with backpacking. The factors that traditionally differentiate backpacking from other forms of tourism include but are not limited to the following: use of public transport as a means of travel, preference of youth hostels to traditional hotels, length of the trip vs. conventional vacations, use of a backpack, an interest in meeting the locals as well as seeing the sights.
The definition of a backpacker has evolved as travelers from different cultures and regions participate and will continue to do so, preventing an air-tight definition. Recent research has found that, "...backpackers constituted a heterogeneous group with respect to the diversity of rationales and meanings attached to their travel experiences. ...They also displayed a common commitment to a non-institutionalised form of travel, which was central to their self-identification as backpackers." Backpacking as a lifestyle and as a business has grown considerably in the 2000s as the commonplace of low-cost airlines, hostels or budget accommodation in many parts of the world, and digital communication and resources make planning, executing, and continuing a long-term backpacking trip easier than ever before.