This document discusses the different uses of the word "will" in the English language. It explains that "will" can be used to make a promise, prediction, or decision at the time of speaking. It also states that "will" can be used to talk about future facts. The document then contrasts "will" with the verb phrase "be going to", noting that "be going to" refers to planned or scheduled future events, while it can also be used to make predictions based on present evidence or plans.