Why can Airbnb achieve crowdsourcing? What is the role of information technology in this process?

1. The reason is that its platform can transform residents' residences into tourist accommodation, which will give tourists more choices and make residents earn income.

2. The role is that Airbnb's platform provides a convenient trading platform for tourists and landlords to conduct safe and reliable transactions.

3. The function is that Airbnb's platform provides a convenient reservation system, through which visitors can find their own accommodation places and make reservations.

4. The function is that Airbnb's platform provides an evaluation system, which can make evaluation and feedback between tourists and landlords, thus improving service quality.

5. The function is that Airbnb's platform provides a social sharing platform for tourists and landlords to exchange and share, thus promoting the development of tourism culture.