A key mechanism is redistributing peak plantar pressure over the plantar surface to prevent excessive load on high-risk areas, especially the forefoot. Custom-made insoles consider individual foot biomechanics to reduce peak plantar pressure. Insoles also absorb and distribute impact loads, enhancing comfort and improving biomechanics. Clinical assessment, involving patient history, gait analysis, and plantar pressure mapping, is crucial for insole prescription, considering factors like foot deformities, mobility, and pressure distribution abnormalities. Insoles are effective in reducing plantar pressure, preventing ulcers, and improving foot function. Both custom-made insole and prefabricated insoles are effective in reducing ulcer risk, though custom-made insole offers tailored support and potentially greater plantar pressure reduction. The benefits extend beyond pressure relief to include significant shock absorption, enhanced gait and stability, and crucial ulcer prevention.