Inn is the title of ancient hotel. People will find places to stay when they go out for a long trip, and those who provide these places for people to stay temporarily are called inns. It is to meet people's needs for outing or long-distance travel. Some hotels with relatively simple equipment are also used by merchants to stack goods and handle transshipment. Now the word inn has changed from a real thing to a synonym for gathering feet. Now online chat rooms or forums are also called inns.