Airbnb is a global online marketplace that facilitates short-term lodging, vacation rentals, and tourism experiences. Founded in 2008 by Brian Chesky, Nathan Blecharczyk, and Joe Gebbia, the platform allows individuals to list and book accommodations ranging from apartments and houses to unique stays like treehouses and castles. Operating in over 190 countries, Airbnb has transformed the hospitality industry by enabling peer-to-peer rentals and expanding travel options for millions of users.