Im brand new here, long time lurker. Im sorry this is my first 'intro' post but I thought I may be able to help.
I have been squatting everyday (6x/wk) for about 6 months, and back when I thought I could do anything with o lifting, was upwards of 10x a week. I used to get bad knee pain until I got this piece of advice.
I take a moderate stance, like a regular standing width, than half step out. Key is to point the toes OUT farther than you think they should be, then as you descend to overly shove out the knees. If the toes are point out far enough, like 40°, the knees will track fine. You raise out of the box with hip drive and not lifting the head. This tends to improve bar pathology, as it will be more critical to keep the bar in the right path. Losing balance is harder, but so it regaining it since you dont have much forward foot area to push off of, if that makes sense.
What happens is most people impinge the hips too much while squatting, which doesnt allow the hamstring to function properly. This places uneven stress at the ADL/CDL and just around the knee joint generally, and eventually something becomes inflamed. This is what people are doing when they have the infamous 'squat good morning'. Quads and hams arent working together, but rather one at a time.
This method does not allow as much of a forward knee movement as most guys are used to, so lots of people find lifting shoes unnecessary since it requires less ankle flexibility.
You must squat BETWEEN the thighs, and not ontop of them.
Understand that if you develop any form of tendonopathy, it can never truly be healed. It is a permanent injury that can be remidiated, but it will always reinjure easier the next time. Ask my left elbow how I know.