Purpose of wedge

Yes, the wedge helps lift your sit bones and therefore antevert (tip forward) your pelvis. You can create your own natural built-in wedge by using your gluteal muscles adequately (walking well is your natural opportunity to do this). You will also need to relax any tight muscles/ligaments in the groin region.  Ideally, your pelvis will default to a healthy position, but if you have been tucking your pelvis for years, give this a year or two to reset.

You'll know you are there if when you sit relaxed, your spine stacks well without any muscular tension or compression, and your spine moves easily up and down with your breath.