Sustainable Tourism certifications are programs that measure a Range of environmental, socio-cultural, and economic equity issues both internally (within the business, service, or product) and externally (on the surrounding community and physical environment).

Other definition:
Sustainable tourism is, according to the World Tourism Organization, "envisaged as leading to management of all resources in such a way that economic, social and aesthetic needs can be fulfilled with maintaining cultural integrity, essential ecological processes, biological diversity, and life support systems."

Other definition:
Sustainable tourism is the Tourism that does not degrade the environment or local cultures/societies.

Other definition:
Sustainable tourism is the tourism that is economically, socioculturally and environmentally sustainable. With sustainable tourism, sociocultural and environmental impacts are neither permanent nor irreversible.