The aim and subject of this final paper is to explain what is sustainable marketing, its goals and strategies, and the application of sustainable marketing to the business of the company "LEGO". Sustainable marketing is a type of marketing that uses products and services that respect the environment and social aspects. It aims to improve the quality of life by promoting products, services and ideas that do not harm the environment. Sustainable marketing emphasizes the importance of preserving the natural environment and controlling the use of resources, retaining consumers and meeting their wishes and needs, while minimizing the harmful effects on the environment. Companies can use sustainable marketing for a particular product, time-sensitive reason or even as a promotion of their company. The goals of sustainable marketing are: economic, environmental and social goals. A good understanding of the marketing environment allows a company to consider some of the issues related to developing sustainable marketing strategies. There are five main steps in formulating a sustainable marketing strategy, namely: assessment of sustainable factors and participants, sustainable market segmentation, introduction of sustainable innovations, positioning of sustainable products and cooperation with sustainable stakeholders. LEGO is one of the companies that operates with sustainable marketing. By dedicating part of their website to its sustainability programs, it is a brand that has a clearly defined goal of its environmental efforts. The LEGO group has two goals: all packaging sustainable until 2025 and all products sustainable until 2030. The sustainability strategies that guide LEGO are: the LEGO Replay program, the sustainable materials strategy and the sustainable packaging strategy. The final paper explain sustainable marketing and its application to the company, which are sustainability strategies on the example of LEGO. The research was conducted on the basis of secondary data collected through the LEGO website and other sources. The main conclusion of the paper is that sustainable marketing is one of the main possible sources of competitive advantage of the analyzed company.