Seonangshin is a Korean word that refers to a type of spirit or deity that is believed to protect a specific area or village. Imagine a guardian angel but for a whole neighborhood or town.
In Korea, it is believed that every place has its own seonangshin which watches over and protects the people who live there. Sometimes people will create small shrines or altars to these spirits to show their respect and ask for their protection.
These spirits are also sometimes called "village gods" and are sometimes portrayed as having human-like qualities, such as being benevolent and protective. It's similar to how you might feel more comfortable in your own bedroom because it feels safe and familiar - people believe that seonangshin create that same feeling for the whole town or village.
Overall, seonangshin are an important part of Korean mythology and culture, and are seen as benevolent protectors of communities.