My absolute fave exercise for glutes has turned out to be hip-thrusts.  I’m pretty sure I’ve been shown at the gym the correct form, but I’m open to learning.  Mainly, I want to avoid injuries 
I wanted to make this thread for any Bench-type exercises, not just Hip-thrusts and feedback is very welcome on other types of weight resistance etc.(bands, bar-bells, dumb-bells)
So I’ll ask (video below) about this “form” the guy is using, and for me, this one is the most comfy as it’s my shoulders way more than my back. At first I was trying to keep my whole back flat on the mat before I tried the bench and just lift my butt, but little range of motion. Feed back welcome as to what you’ve found to be the best form:
      
    
  I was most interested in the thrusts, so definitely the mat for them as the bench was too high and the mat-way just looked like it was made for me