Answer:
Setting is the time, place, and social/historical context in which a story takes place.
Step-by-step explanation:
The setting is the "where and when" of a story. The place, the time in history, the social context, all of those elements constitute the setting in which the story develops. The characters are usually very much influenced by it. If a story takes place in the 1800's, the characters involved will certainly have different points of view and worries when compared to characters whose story takes place in our century.
Of course, the setting of the story can change with the plot's development.