Here's a step-by-step guide on how to do a squat correctly:

Starting Position:
Stand with your feet shoulder-width apart or slightly wider.
Keep your toes pointing slightly outward.
Engage Your Core:
Tighten your core muscles by drawing your belly button in towards your spine. This helps stabilize your spine throughout the movement.
Lowering Phase:
Initiate the movement by pushing your hips back as if you are sitting down into a chair. This action helps to shift your weight onto your heels, which prevents your knees from coming too far forward.
Keep your chest up and back straight. Avoid rounding your back.
Depth:
Lower yourself down until your thighs are at least parallel to the floor. You can go deeper if you have the flexibility and strength, but avoid letting your knees collapse inward.
Knee Position:
Ensure your knees are in line with your toes throughout the movement. They should not collapse inward or jut out too far beyond your toes.