The document discusses the uses of "be going to" and "will" to express future plans and predictions. It provides examples of how to use each to talk about different types of future events. It explains that "be going to" is used for plans and decisions that have already been made, while "will" is used for predictions, offers, promises, and less definite plans. The document also includes exercises for learners to practice using "be going to" and "will" in sentences correctly.