What is the Airbnb service and who removes and passes through it real estate?

Today, many people invest in real estate, and then rent it out. However, this is not the best investment for those who do not know how to make investments and do not know the market. For those who are well oriented in this area, apartments can bring real income, especially after the appearance of such an international resource as Airbnb, which allows any person to profitably rent an apartment in any city instead of booking rooms in a hotel.