Hitting Budapest ~ Worldbuilding

What are the precise strategies that are used by its creator to convey the world to us and us to the world? 

Rather than giving us bland visual descriptions of everything in the story, the author uses the characters and their interactions to convey information about the world. This allows the reader to visually perceive the world where the characters dwell without needing to much description. There is also a good use of contrast at play, where a standard neighborhood from our perspective seems to be on a much grander scale from our characters. When the author does use physical description, it is never plainly stated out what the object is at times. Such as when the tall, thin lady was eating the food the characters wanted. It's never stated what that is, but it leaves it up to the  reader's imagination (I for one thought of poptarts). The author describes this as a mystical food, and this also reveals more about the world and how that area is more high class and fantastical than the world our characters grew up, which is completely left to the reader's imagination. The author also plays with the contrast between their world and the reader's world, and they make use of this contrast to make the world seem more surreal, which allows the reader to have a more imaginative view of the world, which also makes the world seem more connected to the reader.