Airbnb is one of the world renowned website for travel enthusiasts. It helps us book homes , or rooms from people all around the world. Airbnb does not book hotels, rather than that you can choose to stay at other peoples home.
Evrything from shared rooms to huge villas are available. Air bnb website and app are very well designed and have good usablity. But one feature I wish their app had was sorting based on prices or reviews etc. But the app overall is a delight to use. Airbnb allowes you to connect with the people who have listed their property before you book them.
This is very good as you can clarify your doubts before booking. And the stay experience has been very good with the hosts. I stayed in a room booked through airbnb in ooty recently and stay was pleasent. But please read reviews of individual hosts before booking. I would definetly recommend anyone who is planing to travel anywhr to check out airbnb once.