Together with the developing social technologies, concepts such as "sharing, bartering, lending, trading, renting, and swapping have recently been included in our lives. The sharing economy, which has emerged in the last ten years, enables peer-to-peer (P2P) use of products, transportation, and products through online platforms.

It can be said that the sharing economy provides solutions that make life easier for individuals and creates new environmental, economic, and sociological problems. Although there has been a share in society throughout history, it is a new phenomenon to share commodities with a stranger. Sharing with a foreigner, especially on P2P platforms offered by social technologies have become an everyday habit. On P2P platforms, mutual parties' commenting and scoring to each other increases the reliability of the environments. In addition to the characteristics of the sharing object, people choose the person to share based on the previous comments. This process makes sharing with a stranger less risky and more attractive.

 There are studies compiled in the literature, with the opinions of the users of P2P sharing economy platforms. However, there are few studies on the impact of these platforms on society. This study aims to reveal the social effects of Airbnb, one of the P2P sharing economy housing platforms.

The study was conducted only within the scope of the Airbnb platform. Airbnb is a system established in 2008 when a landlord leases his house or part of the house to another person or persons on a short-term basis traveling.

Airbnb is based on the the logic of matching, who leases their homes or parts of their homes for those seeking short term rent. Airbnb has 150M users, 2M accommodation per night, 6M house, and 35B  USD value in 190 countries around the world.

In this study, the The Airbnb concept was investigated first by the literature review. The volume of Airbnb in Istanbul was analyzed by accessing the Airbnb website.

Besiktas district, which is one of the most used areas of Airbnb, was selected for the case study. For the case study, three groups of actors were identified: (1) the owners of the house or part of the house, (2) the tenants and (3) the neighbors. Semi-structured in-depth interviews were conducted with a sample (n=45) of these actors. The raw qualitative data obtained from the interviews were processed by the content analysis method. According to the results of the field study, the landlord provides economic benefits and generally has a pleasant time with his guests. The tenants feel more local and have a unique accommodation experience. Some of the neighbors think Airbnb makes the neighborhood insecure, as there are people, they don't know in the housing area. Some of them are happy to see diversity in the neighborhood. It has been observed that the number of facilities and shops providing service in the settlement, which has an intensive circulation of Airbnb, has increased. However, especially in Besiktas, which is preferred by foreigners, the rent of properties and service costs of enterprises increase. This situation can be expressed as Airbnb's other adverse effects on the neighborhood.

Keywords- P2P platforms, Sharing Economy, Social Effect, Airbnb