Hotels are commercial establishments that provide lodging and other amenities to travelers and residents on a short-term basis for a fee. They range in size and quality of facilities from small rooms with basic amenities to large resorts with numerous luxury services and recreational facilities. Hotels play an important economic and social role by generating income, employment, and tax revenue while also promoting infrastructure development, international trade, and cultural exchange. They are classified based on size, star ratings which indicate amenities and quality levels, and location such as city centers, suburbs, airports or resort destinations.