Incluing is a technique of world building, in which the reader is gradually exposed to background information about the world in which a story is set. The idea is to clue the readers into the world the author is building, without them being aware of it.

This in opposition to infodumping, where an undigested lump of background material is dropped into the story, often in the form of a conversation between two characters both of whom should already know the material under discussion. (The socalled As you know, Bob conversation.)

Both incluing and infodumping are forms of exposition and are frequently used in Science Fiction and Fantasy, genres where the author has the task to make the reader believe in a world that does not exist. Writers in other genres have less use for these techniques, as they can often depend on the reader's familiarity with the "real world".

The word incluing is attributed to Fantasy and Science Fiction author Jo Walton