This graph shows us the evolution of the annual gross booking value generated by the company Airbnb, with the horizontal axis covering the years 2015 up till 2019. The vertical axis indicatestindicates the annual gross booking value.

At first glance, it is clear-cut that the company Airbnb has had an epic run since 2015,. Airbnb has skyrocketed in popularity as an alternative to hotels. The most striking conclusion we can draw from this graph is that the gross booking value has increased remarkably over the last five years, from 8.1B to 38,.0B.
At the beginning of the graph, in 2015, we see that the number of overnight stays and experiences booked by customers amounted to 72.4 million, in. In the following four years, the figures were 125.7M, 185.8M, 250.3M and 326.9M respectively. In other words, the number of overnight stays and experiences booked by customers has soared 4.5 times since 2015. In addition, we can see from the graph that gross booking value of these bookings rose from $8.1 billion to $38.0 billion. These impressive figures are mainly due to the large-scale possession of rooms that can be rented. The company has 5 million rooms available, which is about the same size as the five largest hotel chains combined. A primary reason for the company's success is the number of people (both guests and hosts) using Airbnb.
As of today, there are approximately 2.9 million hosts on Airbnb, and approximately 14,000 new hosts are added every month. It also operates in 100,000 cities worldwide.

In conclusion, Airbnb's success is mainly due to its huge number of users and rooms.