Sustainable investment refers to an investment strategy that takes into account not only financial indicators but also environmental, social, and ethical criteria (ESG criteria: environmental, social, governance). The aim is to make economically successful long-term investments that also make a positive contribution to the environment and society. In the hotel and real estate industry, this means, for example, promoting energy-efficient buildings, social responsibility in corporate management, or investing in projects with sustainable value creation. Sustainable investments are becoming increasingly important as investors, regulators, and guests place greater emphasis on responsible business practices.