Tourism is one of the world's fastest growing industries and an important source of foreign exchange and employment, while being closely linked to the social, economic, and environmental well-being of many countries, especially developing countries. Maritime or ocean-related tourism, as well as coastal tourism, are for example vital sectors of the economy in small island developing States (SIDS) and coastal least developed countries (LDCs) (see also: The Potential of the Blue Economy report as well as the Community of Ocean Action on sustainable blue economy).

The World Tourism Organization defines sustainable tourism as “tourism that takes full account of its current and future economic, social and environmental impacts, addressing the needs of visitors, the industry, the environment and host communities".

Based on General assembly resolution 70/193, 2017 was declared as the International Year of Sustainable Tourism for Development.

In the 2030 Agenda for Sustainable Development SDG target 8.9, aims to “by 2030, devise and implement policies to promote sustainable tourism that creates jobs and promotes local culture and products”. The importance of sustainable tourism is also highlighted in SDG target 12.b. which aims to “develop and implement tools to monitor sustainable development impacts for sustainable tourism that creates jobs and promotes local culture and products”.

Tourism is also identified as one of the tools to “by 2030, increase the economic benefits to Small Island developing States and least developed countries” as comprised in SDG target 14.7.

In the Rio+20 outcome document The Future We want, sustainable tourism is defined by paragraph 130 as a significant contributor “to the three dimensions of sustainable development” thanks to its close linkages to other sectors and its ability to create decent jobs and generate trade opportunities. Therefore, Member States recognize “the need to support sustainable tourism activities and relevant capacity-building that promote environmental awareness, conserve and protect the environment, respect wildlife, flora, biodiversity, ecosystems and cultural diversity, and improve the welfare and livelihoods of local communities by supporting their local economies and the human and natural environment as a whole. ” In paragraph 130, Member States also “call for enhanced support for sustainable tourism activities and relevant capacity-building in developing countries in order to contribute to the achievement of sustainable development”.

In paragraph 131, Member States “encourage the promotion of investment in sustainable tourism, including eco-tourism and cultural tourism, which may include creating small- and medium-sized enterprises and facilitating access to finance, including through microcredit initiatives for the poor, indigenous peoples and local communities in areas with high eco-tourism potential”. In this regard, Member States also “underline the importance of establishing, where necessary, appropriate guidelines and regulations in accordance with national priorities and legislation for promoting and supporting sustainable tourism”.

In 2002, the World Summit on Sustainable Development in Johannesburg called for the promotion of sustainable tourism development, including non-consumptive and eco-tourism, in Chapter IV, paragraph 43 of the Johannesburg Plan of Implementation.

At the Johannesburg Summit, the launch of the “Sustainable Tourism – Eliminating Poverty (ST-EP) initiative was announced. The initiative was inaugurated by the World Tourism Organization, in collaboration with UNCTAD, in order to develop sustainable tourism as a force for poverty alleviation.

The UN Commission on Sustainable Development (CSD) last reviewed the issue of sustainable tourism in 2001, when it was acting as the Preparatory Committee for the Johannesburg Summit.

The importance of sustainable tourism was also mentioned in Agenda 21.