for GT. The number one purpose is to set up everything else, and any big plays that come from it are just gravy.
"Freezing" defensive players is what I like most. If they are waiting, they are not attacking, and they can be caught flat-footed. But any quick search on the google
will tell you all you want to know about the jet sweep advantage, like this purloined tidbit below...

The jet sweep:

1. You can add Jet Sweep Motion to all kinds of run and pass plays
Before we talk about actually handing the football off on the jet sweep, let’s talk about something that’s equally dangerous for the defense: The threat of the jet sweep.

Just by putting a guy in motion from one side of the formation to the other while running a completely unrelated concept and you get defenders to freeze or even stick their nose in the backfield while you run a pass concept deep down the field to a now wide open receiver.

Teams have been pairing up the jet sweep with their more traditional run concepts for decades, and do you know why they continue to do it even after all these years?

Because it works.

2. Creates new formation variations
Building on the first point, this has as much to do with scheme and preparation as actual play on the field.

This doesn’t sound like a big deal until you realize that defensive coordinators need to have a plan for every single one of them.

If the defensive coordinator doesn’t have a plan to stay gap sound and keep a hat on a hat for every possible way you have to run the jet, then eventually you’ll figure out what it is and gash the defense for a huge gain.

3. Easy way to get the football to your playmakers
So many offenses these days are running the bubble screen and have other quick throws to get the football to their speedsters, but the simplest way is to shorten the distance between the quarterback and the intended receiver as much as possible.

The great thing is that you can very easily add this to your bag of tricks without much effort, and the payoff can be massive.

4. Makes tacklers run and cover guys tackle
Since the jet sweep is a great way to get the football out on the edge in a hurry, what often ends up happening is that the ball carrier gets matched up on the outside with a single corner or safety having to make a tackle on his own.

If that particular defender isn’t such a great tackler, then a quick hand off across the formation can turn into a huge play just because your guy is better in space than their guy.

Like coaches say, it’s not about the X’s and O’s, it’s the Jimmys and Joes, and if you’ve got a speedy and agile guy who can make people miss in the open field, then adding the jet sweep to your offense is a great way to manufacture opportunities for your best guy to match up against their worst guy.

5. Eliminates linebacker run fits
When you’ve got a side-to-side threat like the jet sweep presents, the linebackers can’t simply flow downhill to take away a traditional north and south run scheme.

If they can’t flow downhill, then they can’t build momentum to match the big offensive linemen coming at them to seal them off from the play.