What exactly is prolapse, and what does it feel like?

I had a stage 1 anterior wall prolapse, and for me it felt similar to an air bubble or a tampon that was about to fall out. I felt like I needed to queef constantly. I had a heavy feeling in my pelvis and sex was painful in certain positions (which I know now was actually due to tension). I also felt like I couldn’t fully evacuate when pooing, but have since learned this was also due to tension in my pelvic floor.