The global market economy provides companies with the opportunity to do business from the most appropriate location in the world to meet their business goals. Countries, cities and other territorial divisions persuade firms to choose a particular location using complex investment offers summarising the possible benefits to be achieved operating in the selected location. Various marketing tools are used to promote these offers, including modern forms of Internet promotion. The paper includes the analysis of the activities of Polish local government units carried out in the world’s largest social media service addressed to the business user - LinkedIn. The methods used to present the offer and related instruments are described. Also, the author tried to determine the development of this form of territorial investment promotion in Poland and its prospects compared to the use of LinkedIn by administrative units from Europe and the world.