The Great Tribulation Past or Future Matthew 24:21

The Great Tribulation has been subjected to much discussion and controversy. Many believe that it is yet to come. Others say have multiple views about the great tribulation. Some believe  the alleged Rapture will precede the great tribulation by 7 years, others by 3.5 years and others in which the saints will not experience the tribulation at all. Which of these are accurate? experience tribulation.

Are we to in fact experience a tribulation or a Rapture? How does a future Rapture and a future great tribulation align with the Lord's words in Matthew 24:34?