At the beginning of every scrimmage down, the offense may form a quick meeting to discuss the upcoming play. This is called the huddle and it is usually led by the quarterback a player in the offensive-unit that we'll learn about soon.
The offense may choose to skip the huddle. This strategy is called hurry-up offense. It is often to used to confuse the defense and to give them the shortest amount of time to rest and get ready for the next scrimmage down.