The foot is a complicated part of the body because there are a lot of small bones that are joined collectively by so many ligaments and moved by a lot of muscles. On top of that we bear weight on the foot and subject it to so many stresses and strains. To make it worse we put the foot inside the unnatural environment of footwear. It is for this reason that the profession of podiatry exists as there is just so much which will go wrong with the foot and related structures. Podiatry practitioners utilize a wide range of different treatments to treat problems of the feet and lower limb.
Foot supports can be used to manage the wide range of problems that can be wrong with the feet. The goal of foot orthoses are to change alignment of the feet in the direction of a more corrected normal alignment or to lower the load in structures of the feet that are painful to enable them to get better. The foot supports achieve that via having various design characteristics which are meant to match the feet. A bespoke foot orthoses can do that. However, over the counter supports can do that, usually by chance. They might or might not match the foot of the person using them in contrast to a bespoke insert will. There are numerous designs that can be varied, for example the elevation of the mid-foot along with the level of cushioning. There are even designs referred to as Kinetic wedge and Cluffy Wedge.
Occasionally the more affordable over-the-counter type insoles are better and other times the customized ones are better. It will all depend on the nature of the problem, the foot type and shape as well as the advice of a good specialist in regards to what is the better choice. When you have a problem with your feet and think you need some foot orthotics, then go to a good podiatrist.