The article discusses senior-friendly solutions that can be used by city authorities in order to create an optimal place of residence for people aged 60+. The aspects of the use of new IT technologies in various areas of the functioning of older people were emphasized. Attention was paid to both the possibilities of implementing telematics and IoT in city management, as well as websites and applications, the use of which by seniors can significantly facilitate their life in the city. The elements influencing the effectiveness of the senior policy by city authorities were indicated. The issues discussed are very important not only for inhabitants and the improvement of their quality of life in the city, but are also of great importance from the marketing point of view and shaping the city's image.

The aim of the article is to show the benefits of implementing ventures using the collective intelligence of online communities. The article was written based on a literature review. The author brings closer and systematizes the concept of crowdsourcing. There are identified factors that favor him and those that can limit the process and its effectiveness. The research shows that crowdsourcing is becoming an important trend in the collaborative economy through driving innovation, increasing the level of effectiveness of task implementation and allowing to achieve a better competitive position on the market.