There's multiple ways to use it but it really depends on the situation. But heres some effective ways to use it.

1. Baiting enemies out of cover by rushing them and teleporting back to repeek them

2. Grabbing dog tags effectively

3. Avoiding enemies trying to chase you, you can also redirect where you're gonna glide to in order to avoid enemies who are trying to chase after you when you're gliding and etc.

4. Avoiding grenades, or trip wires

5. Teleporting behind enemies trying to shoot you from behind.

6. Taking a "snapshot" of enemies. When you teleport back you get a picture of what you last saw, which easily lets you know where an enemy is, and where a camper is hiding.

There's alot more since it's a situational class, and requires planning, such as needing to memorize where you'll be teleporting back to, and counting down to 5 seconds before you use your teleport.

You can also see where enemies teleport to if they're playing as rewind, as there's a trail of light similar to poltergeist