A display window is like a big picture frame that stores put in front of their stores to show people what they sell. It's like a sneak peek of the store, so you know what kind of stuff you can buy before even going in. Think of it like a movie trailer! People who walk past the store can see what kind of things are inside and decide whether they want to go in and check it out. The store decides what to put in the display window, and they might change it up throughout the year to match different seasons or holidays. It's a fun way for stores to attract the attention of people passing by.